The Lake County forecast said there are chances of rain during the day on Friday and on Friday night.
Friday also is expected to be windy, with wind speeds of close to 15 miles per hour and wind gusts of more than 20 miles per hour.
Chances of rain and thunderstorms increase on Saturday morning.
Throughout the day on Saturday, the Pear Festival will be taking place in downtown Kelseyville.
Chances of rain are highest after 11 a.m. Saturday. Conditions are forecast to be partly sunny, with a high near 62 degrees, and a north wind of between 7 and 10 miles per hour.
Temperatures this week will top out in the high 70s, with nighttime lows in the low 50s, the National Weather Service said.
The forecast calls for dry weather to return early next week, with near-normal — and possibly warmer — temperatures expected.
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