National Weather Service Forecast for: Janesville CA
Issued by: National Weather Service Reno, NV
Updated: 11:30 am PDT Jul 12, 2026
 
Tonight

Tonight: A 20 percent chance of showers after 11pm. Patchy smoke between 10pm and 1am. Mostly cloudy, with a low around 61. Southwest wind 5 to 10 mph becoming light west in the evening. Winds could gust as high as 20 mph.
Slight Chance
Showers

 Monday

Monday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.
Partly Sunny
then Slight
Chance
T-storms
 Monday
Night
Monday Night: Patchy smoke before 7pm. Partly cloudy, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Patchy Smoke
then Partly
Cloudy
 Tuesday

Tuesday: A 20 percent chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.
Slight Chance
T-storms

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 58.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 94.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 57.
Mostly Clear
Lo 61 °F Hi 87 °F Lo 59 °F Hi 89 °F Lo 59 °F Hi 93 °F Lo 58 °F Hi 94 °F Lo 57 °F

 

Tonight
 
 A 20 percent chance of showers after 11pm. Patchy smoke between 10pm and 1am. Mostly cloudy, with a low around 61. Southwest wind 5 to 10 mph becoming light west in the evening. Winds could gust as high as 20 mph.
Monday
 
 A 20 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
 
 Patchy smoke before 7pm. Partly cloudy, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
 
 A 20 percent chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
 
 Mostly clear, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
 
 Sunny, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 58.
Thursday
 
 Sunny, with a high near 94.
Thursday Night
 
 Mostly clear, with a low around 57.
Friday
 
 Sunny, with a high near 95.
Friday Night
 
 Partly cloudy, with a low around 60.
Saturday
 
 Partly sunny, with a high near 93.
Saturday Night
 
 Mostly cloudy, with a low around 61.
Sunday
 
 Mostly sunny, with a high near 93.

 

Forecast from NOAA-NWS for Janesville CA.