National Weather Service Forecast for: Janesville CA
Issued by: National Weather Service Reno, NV
Updated: 11:30 pm PDT Jun 21, 2026
 
Overnight

Overnight: Mostly clear, with a low around 55. West wind around 5 mph.
Mostly Clear
 Monday

Monday: Sunny, with a high near 92. West wind around 5 mph becoming calm.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 56. West wind 5 to 10 mph, with gusts as high as 20 mph.
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 93. Light west wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunny
 Tuesday
Night
Tuesday Night: Clear, with a low around 55. West wind 5 to 10 mph, with gusts as high as 25 mph.
Clear
 Wednesday

Wednesday: Sunny, with a high near 92. Calm wind becoming west around 5 mph in the afternoon.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 54.
Clear
 Thursday

Thursday: Sunny, with a high near 90.
Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 53.
Mostly Clear
Lo 55 °F Hi 92 °F Lo 56 °F Hi 93 °F Lo 55 °F Hi 92 °F Lo 54 °F Hi 90 °F Lo 53 °F

 

Overnight
 
 Mostly clear, with a low around 55. West wind around 5 mph.
Monday
 
 Sunny, with a high near 92. West wind around 5 mph becoming calm.
Monday Night
 
 Mostly clear, with a low around 56. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
 
 Sunny, with a high near 93. Light west wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
 
 Clear, with a low around 55. West wind 5 to 10 mph, with gusts as high as 25 mph.
Wednesday
 
 Sunny, with a high near 92. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
 
 Clear, with a low around 54.
Thursday
 
 Sunny, with a high near 90.
Thursday Night
 
 Mostly clear, with a low around 53.
Friday
 
 Mostly sunny, with a high near 82.
Friday Night
 
 Mostly clear, with a low around 51. Breezy.
Saturday
 
 Sunny, with a high near 79.
Saturday Night
 
 Clear, with a low around 46.
Sunday
 
 Sunny, with a high near 79.

 

Forecast from NOAA-NWS for Janesville CA.