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New Tool
Extreme Weather (beta)

Explore extreme temperatures for past weather and present day. This tool provides data from 38 weather stations across California, utilizing a quality-controlled dataset for hourly weather observations curated for use by the energy sector.
New Data
Hourly Observed Historical Data

This product consists of 39 stations across the state, each with an observation period of greater than 30 years (1973 to present) from the HadISD global record. Download CSV files and User Guide from the Cal-Adapt Data Server.

Climate Tools

Explore projected changes in temperature, precipitation, snowpack and sea level rise in California over this century with our interactive climate data visualizations.

Explore

Download Data

Search climate datasets on Cal-Adapt and download data for various climate variables, scenarios and models using different spatial and temporal aggregation options in tabular and raster formats.

Explore

Find Resources

Search State of California's Research Catalog, explore peer-reviewed publications, understand how to use climate projections.

Explore

Use the Cal-Adapt Web API to build your own applications.

Integrate climate projections for California with your own tools and workflows. Based on accepted standards for REST, JSON and HTTP. For more information about the using the Cal-Adapt API, check out the API documentation or contact us for more information.

Get updates on new Climate Tools, Data and Resources on Cal-Adapt.

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Cal-Adapt Contributors

Cal-Adapt synthesizes volumes of downscaled climate change projections and climate impact research from California's scientific community.