The 10-day span for Guerneville runs from a high near 91° on Wednesday down to 47° overnight on Monday. About 0.05 in of precipitation is expected in total; the most likely wet day is Thursday (57% chance). The NWS alert board for this area is currently clear. Right now Guerneville is about 12° cooler than nearby Reno. Longer view: marine climate — mild, showery winters and dry, gentle summers.
Guerneville, CA · Elev 59 ft · 38.50°N, 123.00°W · California · Forecast computed for these exact coordinates