Temperatures are rocketing into the triple digits for the seventh straight day Thursday – a sizzling setting for 4th of July parades, picnics and backyard barbecues! High temperatures will top out between 105-110 degrees during the afternoon and early evening. A few high clouds will remain overhead, but the thunderstorm threat will be limited to the Sierra Thursday.

The monsoonal moisture responsible for the cloud cover and thunderstorm threat is also keeping humidity levels up. This is a departure from the normal “dry heat” we experience in northern California. The muggy conditions will make this holiday feel even hotter, and people spending time outside need to take these extra precautions:

• Drink plenty of water
• Limit alcohol consumption
• Spend time indoors/air-conditioned areas
• Dress in light weight and light color clothing
• Where a hat and sunscreen to protect skin

The ridge of high pressure responsible for the triple digit heat wave begins to break down Friday, with the delta breeze expected to usher in cooler air from the coast beginning Friday afternoon and evening. This should be enough to drop high temperatures back into the low 90s. We could see the marine layer extend into the delta region early Saturday, with some clouds as far inland as Sacramento. This will help keep highs in the upper 80s Saturday, warming into the low 90s once again on Sunday with sunny skies.

Heat Wave Temps: 6/28 6/29 6/30 7/1 7/2 7/3
Sacramento 105 107 107 106 105 106
Stockton 104 106 105 104 106 101
Modesto 105 107 106 106 106 102
Marysville 106 109 109 109 108 107


Video: Hot, Humid Weather Settles Over Northern California


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