Maps Gauging the Sun's Intesity

With solar cooking, it isn't the ambient air temperature that we use to cook with; it is the intesity of the solar light and radiation hitting the earth.

These maps measure the UV index.
http://www.epa.gov/sunwise/uvindex.html

http://www.wunderground.com/US/Region/US/2xpxUVForecast.html

This is a satellite photo that measures IR.
http://adds.aviationweather.gov/satellite/displaySat.php?region=US&isingle=mult_big&itype=irbw

You might have to copy and paste the URL for this link.