Janesville, CA Weather Forecast
Local 7-day forecast
Slight Chance Snow Showers then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Janesville, CA in one place.
A slight chance of snow showers before 11am. Mostly sunny, with a high near 42.
Local Weather Overview
This forecast page for Janesville, CA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 13, 2026 11:53 AM PDT.
The active forecast window currently covers Apr 16 to Apr 19, 2026 for Janesville, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 16 to Apr 19, 2026
- Latest sync
- Apr 13, 2026 11:53 AM PDT
- Forecast office
- REV
- Source
- NOAA / NWS
Daily Outlook
This Week in Janesville
Saturday looks like the warmest upcoming period in Janesville at 58 degrees F.
Thursday Night is the coolest period ahead with temperatures near 26 degrees F.
The strongest winds are forecast for Thursday at about 10 to 15 mph N.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 13, 2026 11:53 AM PDT
- Coverage
- 5 days
- Time zone
- America/Los_Angeles
- Forecast office
- REV
- Radar station
- KRGX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Clear, with a low around 26.
Sunny, with a high near 52.
Partly cloudy, with a low around 32.
Mostly sunny, with a high near 58.
Partly cloudy, with a low around 36.
A chance of rain showers after 11am. Mostly sunny, with a high near 55.
A chance of rain showers before 11pm, then a slight chance of snow showers. Mostly cloudy, with a low around 35.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 16
|
Slight Chance Snow Showers then Mostly Sunny
|
42°F |
10 to 15 mph
N
|
|
Thursday Night
Apr 16
|
Clear
|
26°F |
5 to 10 mph
N
|
|
Friday
Apr 17
|
Sunny
|
52°F |
5 to 10 mph
NE
|
|
Friday Night
Apr 17
|
Partly Cloudy
|
32°F |
0 to 5 mph
SE
|
|
Saturday
Apr 18
|
Mostly Sunny
|
58°F |
0 to 10 mph
SW
|
|
Saturday Night
Apr 18
|
Partly Cloudy
|
36°F |
5 to 10 mph
SW
|
|
Sunday
Apr 19
|
Chance Rain Showers
|
55°F |
5 to 15 mph
SW
|
|
Sunday Night
Apr 19
|
Slight Chance Snow Showers
|
35°F |
5 to 15 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Janesville.