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Welcome to Aviation Weather Information!

This site provides a variety of weather information intended to assist the aviation community with preliminary flight information. It does this by accessing dozens of data sources and displaying that information in one easy location. While use of this website does not satisfy official Federal Aviation Administration (FAA) preflight requirements, it can assist with providing a more comprehensive understanding of the weather around California’s 243 public use airports.

If you're unsure how to use Aviation Weather Information web portal, take a look at the Quick Start Guide by clicking the “Help” button in the upper left of the screen. Because this site connects to various sources of data, links to these sites sometimes go down unexpectedly for various reasons. If you find any irregularities with a data field, please place a note in our “Feedback” mailbox located at the top right of the screen. Likewise, if you have any recommendations for improvements, leave those in the Feedback mailbox as well.

Aviation Weather Information is provided by Caltrans as a service for informational purposes only. System performance and data quality cannot be guaranteed.

Thank you for using Aviation Weather Information!