Can I get a certified record of historical weather data?

Weather Underground does not certify weather data.

The National Weather Service provides certified reports via the National Climatic Data Center. To request certified climate data for the world, please visit:

You can also obtain certified data through the Midwestern Regional Climate Center (MRCC). For more information, please visit the following site:

WunderWiki guide to History

National Climatic Data Center (NWS NCDC)

Feedback and Knowledge Base