National Weather Service Forecast for: Janesville CA
Issued by: National Weather Service Reno, NV
Updated: 1:15 am PST Feb 2, 2026
 
Overnight

Overnight: Mostly clear, with a low around 29. West wind around 5 mph becoming calm.
Mostly Clear
 Monday

Monday: Sunny, with a high near 57. Calm wind becoming southeast around 5 mph.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 29. Calm wind.
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 54. Calm wind.
Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 27. Calm wind.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 53. Calm wind becoming east around 5 mph in the afternoon.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 29.
Clear
 Thursday

Thursday: Sunny, with a high near 55.
Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 34.
Mostly Clear
Lo 29 °F Hi 57 °F Lo 29 °F Hi 54 °F Lo 27 °F Hi 53 °F Lo 29 °F Hi 55 °F Lo 34 °F

 

Overnight
 
 Mostly clear, with a low around 29. West wind around 5 mph becoming calm.
Monday
 
 Sunny, with a high near 57. Calm wind becoming southeast around 5 mph.
Monday Night
 
 Mostly clear, with a low around 29. Calm wind.
Tuesday
 
 Sunny, with a high near 54. Calm wind.
Tuesday Night
 
 Mostly clear, with a low around 27. Calm wind.
Wednesday
 
 Sunny, with a high near 53. Calm wind becoming east around 5 mph in the afternoon.
Wednesday Night
 
 Clear, with a low around 29.
Thursday
 
 Sunny, with a high near 55.
Thursday Night
 
 Mostly clear, with a low around 34.
Friday
 
 Mostly sunny, with a high near 57.
Friday Night
 
 Mostly clear, with a low around 34.
Saturday
 
 Sunny, with a high near 57.
Saturday Night
 
 A slight chance of rain. Snow level 7000 feet. Partly cloudy, with a low around 35.
Sunday
 
 A chance of rain. Snow level 6600 feet. Mostly sunny, with a high near 53.

 

Forecast from NOAA-NWS for Janesville CA.