 The only potential break from sunny skies and the major heat comes in the form of some monsoon thunderstorm activity from the southwest through some areas of the Rockies. Afternoon storms farther east can be focused from Florida westward along the Gulf Coast. In San Francisco, expect a nice day with sunshine and a high near 70. In Jacksonville, Florida, it will be hot with a spotty afternoon thunderstorm with a high of 97. AccuWeather.com meteorologist Latroy Thornton.