Climate Data Online
Verified working Jul 31, 2026
NOAA’s portal for historical weather observations and climate normals.
Climate Data Online is NOAA NCEI’s access point for historical weather and climate records, including temperature, precipitation, wind, degree days, radar data, station history, and 30-year climate normals. Users can search by station or place, explore records on a map, use specialized data tools, and order certified copies of some records for legal purposes.
Why it stands out
- Backed by NOAA’s official National Centers for Environmental Information archive rather than a third-party aggregation.
- Covers multiple temporal resolutions, from daily records through monthly, seasonal, yearly, and 30-year normals.
- Combines observations, station history, radar-related data, and legal certification options in one access point.
- Supports both map-based discovery and more precise station/name/identifier searches.
- Includes a web-services path for users who need repeatable data retrieval rather than manual downloads.
Good to know
- Some site functionality requires JavaScript.
- Certified copies for legal use require payment, even though general data access is free.
- Coverage and record completeness vary by dataset, station, geography, and historical period.
- Users may need to consult dataset documentation or help pages before choosing the correct tool or data product.
Under the radar: Before ordering or analyzing station-based data, check the station history information or EMSHR Lite download so you can spot station moves, identifier changes, or metadata issues that may affect interpretation.
Photos
Climate researchers, consultants, and legal investigators can retrieve authoritative historical observations for a specific station, location, or time period. Look up past daily or monthly weather conditions for a city, ZIP code, county, state, or country. Compare long-term climate normals with observed temperature or precipitation records. Find station metadata before using an observation series in analysis. Order certified weather records when documentation is needed for litigation or official proceedings.
Search tool for historical climate and weather records by station identifier or geography. Mapping tool for locating and viewing data spatially. Dataset browser with documentation, samples, and links. Specialized data tools for different record types. Order tracking and paid certification workflow for legally usable hard copies. Documented web services for programmatic access.
Technical Notes
- Climate Data Online provides documented web services for programmatic access to its climate datasets.
- NOAA’s CDO web services typically require an access token for API requests.
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Similar sites elsewhere
- ECMWF Climate Data Store — cds.climate.copernicus.eu
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