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Penn Valley, CA Weather Forecast
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Penn Valley Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT |
 |  | | | | | | | |  | | |
| Sunny | Clear | Sunny | Clear | Sunny | Clear | Mostly Sunny | Mostly Clear | Mostly Clear | Chance of Rain | Chance of Rain | Mostly Clear |
| Hi: 94°FHi: 34°C | Lo: 66°FLo: 19°C | Hi: 94°FHi: 34°C | Lo: 66°FLo: 19°C | Hi: 92°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 74°FHi: 23°C | Hi: 71°FHi: 22°C Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C Lo: 49°FLo: 9°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 201 AM PDT Wed Oct 07 2026 
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Issued: 1159 AM PDT Tue Oct 6 2026
Key Messages
- Heat Advisory now in effect till 10 PM Friday for the Sacramento Valley, Delta, northern San Joaquin Valley, and adjacent foothills.
- Widespread Moderate HeatRisk with areas of Major HeatRisk through Friday for the Delta, Valley, and Foothills.
- Confidence is increasing for a cooling trend over the weekend/into next week, with some potential for unsettled weather, and elevated fire weather conditions.
Discussion
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...Today through Friday... Mostly clear skies with some lingering haze ob...