UW Extension Ag Weather

Sun

US Insolation

UW Space Sciences' model provides excellent insolation estimates during most of the year (snow cover looks like clouds to the satellite).

US Insolation (click maps to enlarge)

The insolation estimates are derived from two separate satellite images, and so are presented as two maps. Since the satellites are viewing from two different angles, there may be some variation between the images for the center of the country.

Western USEastern US
Yestwestinsol
Download Western-US data in ASCII format
Yesteastinsol
Download Eastern-US data in ASCII format