To search for weather in any city, simply type the city name into the search bar at the top of the page. You can search by city name alone (e.g., "London"), city with country (e.g., "Paris, France"), or even include state/province for clarity (e.g., "Portland, Oregon, USA"). As you type, suggestions may appear to help you find the exact location. Once you find your city, click on it or press Enter to view the current weather conditions, hourly forecast, and 10-day outlook for that location. The search function supports over 200,000 cities worldwide, making it easy to find weather information for virtually any location on Earth.

After searching for a location, you'll see a "Save Location" or bookmark icon next to the city name. Click this icon to add the location to your saved list. Your saved locations appear in the sidebar or dropdown menu (depending on your device), allowing you to quickly switch between your favorite cities without searching again. All saved locations are stored locally in your browser, so they'll persist between visits. You can save unlimited locations and remove them anytime by clicking the same icon again or using the "Remove" option in your saved locations list. This feature is perfect for tracking weather in multiple cities—your home, workplace, vacation destinations, or cities where family and friends live.

To switch temperature units between Celsius and Fahrenheit, look for the temperature unit toggle in the settings menu (usually represented by a gear icon) or in the top navigation bar. Click the "°C/°F" button or select your preferred unit from the dropdown menu. Your choice is automatically saved in your browser preferences and will be remembered for all future visits. The unit change applies immediately to all temperature displays including current conditions, hourly forecasts, and daily forecasts. Wind speed units will also change accordingly (km/h for Celsius, mph for Fahrenheit). This allows users worldwide to view weather data in their preferred measurement system without manual conversion.

PrestoWeather supports 16 major languages including English, Spanish (Español), French (Français), German (Deutsch), Italian (Italiano), Portuguese (Português), Russian (Русский), Chinese (中文), Japanese (日本語), Korean (한국어), Arabic (العربية), Hindi (हिन्दी), Dutch (Nederlands), Polish (Polski), Swedish (Svenska), and Turkish (Türkçe). To change the language, click the language selector (usually a flag icon or "Language" dropdown) in the navigation menu or settings. The entire interface, including weather descriptions, day names, and navigation labels, will update to your selected language. Your language preference is saved locally and will be remembered on your next visit. Weather data and city names are automatically translated to provide a fully localized experience for users around the world.

PrestoWeather sources its weather data from OpenWeatherMap, one of the world's most reliable meteorological data providers. OpenWeatherMap aggregates data from multiple sources including weather stations, satellites, radars, and meteorological models worldwide. This multi-source approach ensures comprehensive coverage for over 200,000 cities globally. The data includes current conditions, hourly forecasts, daily forecasts, and historical weather information. By partnering with professional meteorological services, we ensure that you receive accurate, scientifically-backed weather information that's trusted by millions of users worldwide. OpenWeatherMap processes billions of weather data points daily to provide the most reliable forecasts possible.

Weather data on PrestoWeather is updated continuously throughout the day. Current conditions are typically refreshed every 10-30 minutes from live weather stations, ensuring you always see the most recent temperature, humidity, wind, and precipitation data. Hourly forecasts are updated every 1-2 hours as new meteorological models run, and daily forecasts are updated multiple times per day as weather patterns evolve. When you open the app or refresh the page, the latest available data is automatically fetched. For rapidly changing weather conditions like storms or frontal passages, we recommend refreshing more frequently to stay informed about the latest developments. The timestamp on the weather data shows when it was last updated.

Weather forecast accuracy varies by timeframe and location. Current conditions and near-term forecasts (1-3 hours) are typically 90-95% accurate, as they're based on real-time observations from weather stations. Today's and tomorrow's forecasts are generally 80-85% accurate for temperature and precipitation. Accuracy decreases gradually for longer-range forecasts: 3-day forecasts are about 75-80% accurate, while 7-10 day forecasts are approximately 60-70% accurate due to the chaotic nature of atmospheric systems. Forecasts are most reliable for temperature and general conditions, while precipitation timing and intensity can be more challenging to predict precisely. Urban areas with more weather stations typically have more accurate data than remote locations. We continuously work with our data providers to improve forecast accuracy.

Weather forecasts change because the atmosphere is a complex, chaotic system where small variations can lead to large changes in weather patterns—a phenomenon sometimes called the butterfly effect. As meteorologists gather more data from satellites, weather stations, and atmospheric models, they continuously refine predictions. A forecast made 7 days in advance is based on less information than a forecast made 1 day in advance, so earlier predictions are more likely to change. Weather models run multiple times daily, incorporating the latest observations and adjusting predictions accordingly. Especially for precipitation and severe weather, timing and intensity can shift as storm systems evolve. This is normal and actually indicates that forecasters are using the best available data rather than sticking with outdated predictions. For important planning, check forecasts frequently as your event approaches.

PrestoWeather works on all modern web browsers including Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge, Opera, and Brave. We support the latest versions and generally the last two major versions of each browser. Mobile browsers on iOS Safari and Android Chrome are fully supported with responsive design optimized for touch interfaces. The app requires JavaScript to be enabled and works best with HTML5-compliant browsers. For the best experience, we recommend keeping your browser updated to the latest version. Internet Explorer is not supported as it lacks modern web standards required for the app's features. The app uses progressive enhancement, so even on older browsers, core functionality remains accessible, though some advanced features may be limited.

Yes, PrestoWeather is fully optimized for mobile devices and tablets. The responsive design automatically adapts to your screen size, providing an excellent experience on smartphones, tablets, and desktop computers. On mobile, you'll find touch-friendly buttons, swipeable forecast cards, and streamlined navigation perfect for smaller screens. The app works in any mobile browser (Safari on iOS, Chrome on Android, Firefox Mobile, etc.) without requiring an app store download. All features available on desktop are accessible on mobile, including location search, saved locations, unit preferences, and language selection. The mobile experience is fast and data-efficient, loading quickly even on slower 3G/4G connections. The interface automatically adjusts for portrait and landscape orientations.

Yes, PrestoWeather is a Progressive Web App (PWA) that can be installed on your phone or tablet like a native app. On Android devices, when you visit PrestoWeather, you'll see an "Add to Home Screen" or "Install" prompt in your browser (Chrome, Edge, etc.). On iOS devices, open the site in Safari, tap the Share button, and select "Add to Home Screen". Once installed, the app icon appears on your home screen alongside your other apps. The installed version offers benefits like quick access from your home screen, full-screen experience without browser UI, faster loading times, and limited offline functionality for previously viewed locations. The PWA requires no app store approval, updates automatically when you open it, and uses significantly less storage than traditional apps—typically under 5MB compared to 50-100MB for native weather apps.

PrestoWeather has limited offline functionality designed for brief connection interruptions. When installed as a Progressive Web App, the app interface loads from cache, allowing you to open the app even without an internet connection. Previously viewed weather data is temporarily cached, so you can see the last weather information fetched for your recent locations—useful if you checked the forecast before entering a tunnel or area with poor signal. However, to get fresh, up-to-date weather forecasts, an active internet connection is required. The offline capability is not designed for extended offline use, as weather conditions change constantly. When your connection is restored, the app automatically fetches the latest weather data. This hybrid approach balances functionality with data accuracy, ensuring you always see current conditions when connected while providing basic access during temporary disconnections.

Humidity percentage, or relative humidity, measures the amount of water vapor in the air relative to the maximum amount the air can hold at that temperature. At 100% humidity, the air is completely saturated and cannot hold more moisture, often resulting in rain, fog, or dew formation. At 0%, the air is completely dry (though this is rare in nature). Comfortable humidity levels typically range from 30-60%. High humidity (above 70%) makes hot temperatures feel even hotter because your sweat cannot evaporate efficiently to cool you down—this is why 35°C with high humidity feels much worse than 35°C in dry desert air. Low humidity (below 30%) can cause dry skin, irritated sinuses, static electricity, and makes cold temperatures feel colder. Indoor humidity levels are also important for health, with 40-50% being ideal for preventing respiratory issues and maintaining comfort.

The UV (Ultraviolet) index measures the strength of ultraviolet radiation from the sun reaching Earth's surface. The scale typically ranges from 0-11+, with higher numbers indicating greater UV exposure risk and faster potential for skin damage. Low (0-2) means minimal danger for most people, though fair-skinned individuals should still use sunscreen for extended exposure. Moderate (3-5) suggests wearing sunscreen SPF 30+ for outdoor activities lasting over 30 minutes. High (6-7) requires protective clothing, sunglasses, sunscreen, and limiting midday sun exposure. Very High (8-10) and Extreme (11+) demand serious sun protection including seeking shade between 10 AM-4 PM, wearing protective clothing, and applying high SPF sunscreen every 2 hours. The UV index varies by time of day (highest at solar noon), season, latitude, altitude, cloud cover, and ozone levels. Even on cloudy days, up to 80% of UV radiation can penetrate clouds.

"Feels like" temperature, also called apparent temperature, wind chill (cold weather), or heat index (hot weather), represents how hot or cold it actually feels to the human body when humidity and wind are factored in alongside the actual air temperature. On hot days, high humidity makes it feel hotter because sweat cannot evaporate effectively to cool your body through evaporative cooling. On cold days, wind chill makes it feel colder as wind strips away the thin layer of warm air near your skin, increasing heat loss. The feels like temperature is calculated using complex formulas developed by meteorologists that account for relative humidity in hot weather (usually above 20°C/68°F) and wind speed in cold weather (usually below 10°C/50°F). This measurement is more useful than actual temperature alone for assessing comfort, planning outdoor activities, and recognizing heat stress or hypothermia risks. The difference can be substantial—a 30°C day might feel like 40°C with 80% humidity.

Wind speed measures how fast air is moving, displayed in kilometers per hour (km/h), miles per hour (mph), or meters per second (m/s) depending on your unit settings. Wind direction indicates where the wind is coming from (not going to) using compass directions (N, NE, E, SE, S, SW, W, NW) or degrees (0-360°, where 0° and 360° are north, 90° is east, 180° is south, 270° is west). For example, "NW 15 mph" means wind is blowing FROM the northwest at 15 miles per hour. Wind speed categories: Light winds (0-12 km/h) barely move leaves; Moderate winds (13-38 km/h) move small branches and raise dust; Strong winds (39-61 km/h) make walking difficult and move large branches; Gale force winds (62-88 km/h) can break branches and make walking very difficult; Storm force winds (89+ km/h) can cause structural damage. Wind direction matters for activities like sailing, aviation, and predicting weather changes—different wind directions often bring different weather patterns and temperature shifts.

Hourly forecasts provide detailed weather predictions for each hour over the next 24-48 hours, showing temperature, precipitation probability, wind conditions, and weather descriptions for every single hour. This granular view is ideal for planning activities down to the hour—knowing whether rain will hit at 2 PM or 5 PM, when temperatures will peak during the day, or when wind will be calmest for outdoor activities. Hourly forecasts help you time errands, plan commutes around weather, schedule outdoor work, or decide the best time for a run or bike ride. Daily forecasts show broader weather trends over the next 7-10 days, providing high/low temperatures and general conditions (sunny, rainy, cloudy, partly cloudy) for each full day. Daily forecasts are better for long-term planning like choosing travel dates, scheduling outdoor events next week, deciding when to plan a beach trip, or packing for an extended vacation. Use hourly forecasts for today and tomorrow, daily forecasts for weekly planning.

No account creation is required to use PrestoWeather. The app is completely free and accessible to everyone without registration, login, or sign-up process. All your preferences including saved locations, temperature units, language selection, and other settings are stored locally in your browser using HTML5 local storage technology. This means your data stays on your device and is not transmitted to our servers. You can use all features immediately without providing any personal information like email addresses, passwords, or phone numbers. This privacy-first approach ensures your weather searches and location preferences remain private and under your control. The downside is that clearing your browser data will remove saved settings, and preferences don't sync across devices. For most users, this local storage approach provides the perfect balance of convenience, privacy, and simplicity—no passwords to remember or accounts to manage.

No, saved locations and preferences are not automatically synced across devices because PrestoWeather uses local browser storage without requiring account creation or cloud synchronization. Each browser on each device maintains its own separate list of saved locations, temperature preferences, and language settings. This means if you save locations on your smartphone, they won't automatically appear on your laptop or tablet unless you add them separately. While this lacks the convenience of cross-device synchronization found in apps with user accounts, it offers significant privacy advantages since your data never leaves your device, no third-party servers store your location preferences, and there's no data breach risk. Many users actually prefer this approach as they often favor different locations on different devices—for example, checking local weather and work commute on your phone while monitoring vacation destination weather on your desktop computer.

PrestoWeather collects minimal personal data and prioritizes user privacy. We use IP-based geolocation only to provide weather for your approximate location when you first visit the site, but this location data is not stored on our servers—it's used momentarily to determine your city and then discarded. All user preferences including saved locations, temperature units, and language choices are stored locally in your browser's local storage and never transmitted to our servers. We do not maintain user databases, store personal information, or track your location history. Anonymous, aggregated analytics may be collected to understand general usage patterns (like popular features, browser types, or general geographic regions), but this data cannot identify individual users. We do not track your searches, share data with third parties for advertising, or sell your information. Weather API requests are made directly from your browser to OpenWeatherMap, maintaining your privacy. For complete details, please review our Privacy Policy.

PrestoWeather primarily uses browser local storage rather than traditional cookies to store your preferences. Local storage allows us to remember your settings like saved locations, temperature units, and language preferences between visits without requiring cookies that can track you across websites. This approach is more privacy-friendly and doesn't involve cross-site tracking. We may use minimal essential cookies for basic functionality, session management, and anonymous analytics to improve the service, but we do not use third-party advertising cookies, tracking cookies, or cookies that follow you around the internet. If you clear your browser data (local storage and cookies), your saved preferences will be reset and you'll need to set them up again. You can control cookie settings through your browser preferences—most modern browsers allow you to block third-party cookies while still permitting first-party cookies needed for websites to function properly. We respect your browser's "Do Not Track" signals.

Yes, PrestoWeather is designed with GDPR (General Data Protection Regulation) compliance in mind. We follow data protection principles including data minimization (collecting only essential data), purpose limitation (using data only for weather services), and storage limitation (storing preferences locally on your device, not on our servers). When we use IP-based geolocation for initial location detection, this data is not logged, stored, or retained. We provide transparent information about data collection in our Privacy Policy, clearly explaining what minimal data we process. EU users have full rights under GDPR including the right to access, rectify, erase, restrict processing, and port their data—though since data is stored locally on your device, you maintain full control already by managing your browser settings. We do not engage in automated decision-making, profiling, or selling personal data. We work only with GDPR-compliant third-party services like OpenWeatherMap for weather data. For questions about GDPR compliance or to exercise your rights, contact us at daniel@garden-stack.com.

If your city doesn't appear in search results, try these solutions: First, check your spelling carefully and try different variations—some cities have alternate spellings, names in different languages, or common misspellings. Second, include additional location information like state, province, or country (e.g., "Springfield, Illinois, USA" instead of just "Springfield") since many cities worldwide share the same name. Third, try searching in English if you're using another language, as some smaller cities may only be indexed under English names in the database. Fourth, very small towns, villages, or rural areas (populations under 1,000-5,000 people) may not be in the global weather database—try searching for the nearest larger city, district capital, or regional center instead. Fifth, ensure you have an active internet connection and try refreshing the page. Weather databases cover hundreds of thousands of locations but cannot include every tiny settlement. For extremely remote locations, weather data from the nearest station (possibly 50-100 km away) will be displayed.

If weather data isn't loading, try these troubleshooting steps: First, check your internet connection—weather data requires an active connection to fetch updates from servers. Try loading other websites to verify connectivity. Second, refresh the page (F5 or Ctrl+R / Cmd+R) or clear your browser cache, as cached data can sometimes interfere with loading fresh information. In Chrome/Edge, press Ctrl+Shift+Delete to open clearing options. Third, disable browser extensions temporarily, especially ad blockers, privacy extensions (Privacy Badger, uBlock Origin), or security software that might block API requests to weather services. Fourth, try a different browser (Chrome, Firefox, Safari, Edge) to rule out browser-specific issues or corrupted data. Fifth, check if you're behind a firewall, corporate network, VPN, or strict network security that might block weather API domains. If you see an error message, note what it says—it may indicate API rate limits (too many requests), service outages, or connection timeouts. Wait a few minutes and try again. If problems persist, there may be temporary server maintenance or outages.

To clear individual saved locations, go to your saved locations list (usually accessible via a sidebar, dropdown menu, or "Saved Locations" button), hover over or tap the location you want to remove, and click the "Remove" button, "X" icon, or trash/delete icon next to that specific location. The location will be immediately removed from your saved list without affecting other saved locations. To clear all saved locations and preferences at once, you need to clear your browser's local storage or site data. The method varies by browser: In Chrome/Edge, go to Settings > Privacy and Security > Clear Browsing Data > Cookies and Other Site Data (select "All time" as time range). In Firefox, go to Preferences > Privacy & Security > Cookies and Site Data > Clear Data. In Safari, go to Preferences > Privacy > Manage Website Data > Remove All. Note that clearing browser data removes all preferences including temperature units and language settings, not just saved locations. After clearing, you'll need to set up your preferences from scratch.

PrestoWeather primarily focuses on current conditions and future forecasts rather than extensive historical weather archives. The app shows real-time weather observations and predictions for the coming hours and days, optimized for planning your immediate and near-term future activities. You can see recent weather patterns through the hourly forecast graphs, which sometimes include the past few hours of actual recorded conditions for context and trend analysis. However, we do not currently offer extensive historical weather data like conditions from past weeks, months, or years. If you need detailed historical weather data—such as average temperatures, precipitation totals, or conditions from past dates for research, legal purposes, insurance claims, or climate analysis—you would need specialized climate data services, national weather agencies (like NOAA in the US, Met Office in the UK, or similar services worldwide), or commercial historical weather databases that maintain comprehensive long-term archives.

If you have questions, encounter issues, or need assistance that isn't covered in this FAQ, please contact us at daniel@garden-stack.com. We're operated by Fontaine Farm SRL, a company registered in the European Union. When contacting support, please include details about your issue: what you were trying to do, what happened instead, your browser type and version (e.g., Chrome 120, Safari 17), device type (desktop, mobile, tablet), operating system (Windows, Mac, iOS, Android), and any error messages you saw. Screenshots are very helpful for visual issues. We typically respond within 1-2 business days. For privacy policy questions, GDPR data requests, or general inquiries, use the same email address. We value your feedback and continuously work to improve PrestoWeather based on user suggestions.