About PastWeather

Data Sources

PastWeather aggregates historical weather data from multiple reputable open-source archives and APIs to ensure accuracy and reliability. Our primary data providers include:

• Meteostat: A leading provider of historical weather and climate data, aggregating records from thousands of weather stations worldwide.
• Open-Meteo: Provides high-resolution historical weather data based on reanalysis models, filling gaps where station data might be sparse.

Methodology

We do not generate forecasts. Instead, we query historical archives to retrieve what actually happened on specific dates. When you search for a location, we:

1. Geocode your city to precise coordinates.
2. Query our providers for daily records (temperature, precipitation, wind, etc.) for your selected date range.
3. Cache the results to improve performance and reduce load on upstream APIs.

Data quality & transparency

• We combine Meteostat station observations with Open-Meteo reanalysis when coverage is thin or days are missing.
• Search results identify which provider supplied the weather metrics you are viewing.
• Not every city or date has complete archives, and some recent observations can arrive with delays.

Privacy, ads & safeguards

• Public pages load Google AdSense for advertising and an analytics script for aggregate usage measurement.
• We show a consent banner and store your acceptance choice in the browser so the notice does not reappear every visit.
• Search and feedback endpoints use validation and rate limits to cut down spam and abusive traffic.

Contact & corrections

• Use the public contact form for privacy questions, data corrections, or takedown requests.
• Messages go to the site operator through the same workflow used for homepage feedback.
• Please include the page URL and enough detail for us to review the request quickly.

Saved preferences

• Your language, theme, and measurement preferences are stored in your browser.
• The search form can remember recent inputs on your device for convenience.
• You can clear cookies and browser storage at any time from your browser settings.