Temperatures to climb into 90s, 100s through weekend in Sonoma, Napa counties

Sonoma County residents, with the exception of coastal dwellers, can expect to overheat this weekend, the National Weather Service said.

After weeks of shielded sunlight and cooler-than-normal weather, the clouds will part and temperatures in the interior valleys will climb into the 90s and 100s, weather service meteorologist Dalton Behringer said.

The heat will start rising Wednesday and Thursday as a high pressure ridge forms and pushes into the North Bay. By Friday, highs will be around the upper 80s to lower 90s, with some potential 100-degree hot spots in Napa County.

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