Historical Weather Data: Formats, APIs, and Bulk Downloads

Explore the different ways to access historical weather data with OpenWeather — from bulk archives to API queries for any timestamp. This guide helps you choose the best option depending on your use case, data volume, and level of detail.

What historical weather data OpenWeather provides

OpenWeather provides several types of historical weather data designed for different use cases — from long-term climate analysis to retrieving weather conditions for a specific moment in the past.

Depending on your needs, you can access historical data in several formats:

Bulk downloadable archives covering many years
Historical forecasts (past model outputs)
API access to weather data for any past timestamp
Aggregated daily historical statistics
Timeline endpoints combining historical and forecast data

Historical products overview

History Bulks

Downloadable datasets in CSV and JSON formats
Time Coverage: 47+ years back (from January 01, 1979)
Geo coverage: Worldwide
Access Method: Downloadable datasets
Available through our Marketplace
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History Forecast Bulks

Downloadable Historical archive of 16-days forecast weather data, CSV and JSON formats
Time Coverage: 8+ years back (from October 7, 2017)
Geo coverage: Worldwide
Access Method: Downloadable datasets
Available through our Marketplace
Learn more
Historical weather via One Call 4.0

Historical weather via One Call 4.0 for any timestamp
Time Coverage: 47+ years back (from January 01, 1979)
Geo coverage: Worldwide
Access Method: API via One Call API 4.0
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Daily aggregated history

Daily aggregated historical weather via One Call 4.0
Time Coverage: 47+ years back (from January 01, 1979)
Geo coverage: Worldwide
Access Method: API via One Call API 4.0
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Statistical Weather API

Statistical data on main weather parameters for any day and month of the year
The statistics are calculated based on our Historical weather data
JSON format
The weather data updated every hour
Statistical Weather Data API is available in Expert subscription plan
Leran more

Historical data access methods

1️⃣ Downloadable historical datasets

Large downloadable archives covering multiple years of historical weather observations and model data.Includes:

History Bulks
History Forecast Bulks

Best for: Machine learning, climate research, long-term analytics.Available through our Marketplace

2️⃣ Historical weather via API

Retrieve historical weather conditions for specific locations and timestamps via API.Includes:

One Call 4.0 Historical endpoint
Daily aggregated history

Best for: Analytical Dashboards, on-demand queries.Available via One Call API 4.0 subscription or Professional subscriptions.