Data Collection & Storage

What We Collect

• None by default: WeatherArchive does not collect, store, or transmit any personal information to our servers.
• Local browser storage only: All user preferences, saved locations, and search history are stored exclusively in your browser using IndexedDB and localStorage.

Where Your Data Lives

• Your browser only: Saved locations, recent searches, comparison presets, and user preferences never leave your device.
• No server-side user database: We do not maintain any database of user accounts or personal information.
• No tracking cookies: We do not use tracking cookies or analytics that identify individual users.

Data Retention

• User-controlled: All data is stored in your browser and can be deleted at any time through your browser settings or our in-app "Clear All Data" button.
• Automatic expiration: Weather data cached in your browser expires after 24 hours.

Third-Party Services

Weather Data APIs

• Visual Crossing Weather API / Open-Meteo: Used to fetch historical weather data and climate information.
• Data sent: Only location coordinates (latitude/longitude) and dates are sent to these services.
• No personal information: We do not send any personally identifiable information to weather APIs.

Geocoding

• Nominatim (OpenStreetMap): Used to convert location names to geographic coordinates.
• Data sent: Location search queries (city names, zip codes) only.

Sun Calculations

• SunCalc.js: All sunrise, sunset, and sun position calculations are performed client-side in your browser.
• No external API: No data is sent to external services for sun calculations.

Ahrefs Web Analytics

• Purpose: We use Ahrefs Web Analytics to understand aggregate website usage.
• Data collected: Anonymous, aggregated traffic data with no personally identifiable information.
• Privacy-focused: Ahrefs Web Analytics does not track individual users or create user profiles.

Data Export & Portability

• Export your data: You can export all your saved locations, searches, and preferences as a JSON file.
• Import data: You can import previously exported data into a new browser or device.

Your Rights

• Access: You have full access to all data stored in your browser.
• Deletion: You can delete all stored data at any time.
• Portability: You can export your data as JSON.