Weather & Environment – Wine Country Gazette™

Late-day sun over Lake Berryessa in the Napa County mountains on May 22, 2025. The lake sits in the North Bay Interior Mountains forecast zone, one of two North Bay zones under the weekend heat advisory. (Jesse Pluim / Bureau of Land Management)

Heat advisory covers Sonoma and Napa hills, not valley towns

Posted on October 1, 2026 by Roger Coryell

The National Weather Service put the hills of western Sonoma County and the mountains of Sonoma and Napa counties under a heat advisory from 11 a.m. Saturday to 10 p.m. Sunday. Valley towns fall outside it.

Site by North and Vine