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Halfmoon Lake Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY |
 |  |  |  |  |  | | | |  | | |
| Partly Sunny | Mostly Cloudy | Chance of Showers | Chance of Rain | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Clear | Partly Cloudy | Mostly Clear | Mostly Clear |
| Hi: 65°FHi: 18°C | Lo: 46°FLo: 8°C | Hi: 60°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 62°FHi: 17°C | Lo: 45°FLo: 7°C | Hi: 66°FHi: 19°C | Hi: 67°FHi: 19°C Lo: 47°FLo: 8°C | Hi: 67°FHi: 19°C Lo: 47°FLo: 8°C | Lo: 46°FLo: 8°C | Hi: 63°FHi: 17°C Lo: 43°FLo: 6°C | Hi: 63°FHi: 17°C Lo: 43°FLo: 6°C |
| POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1142 AM PDT Sun Sep 20 2026 
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Issued: 1106 AM PDT Sun Sep 20 2026
Key Messages
1. Minor Heat Risk through Tuesday as temperatures remain at or below seasonal normal values.
2. A disturbance will cross the region on Monday and Tuesday with a slight chance of showers and thunderstorms across the Sierra Nevada Monday afternoon.
3. A warming trend in temperatures starts on Wednesday as the region will see the return of heat during the latter part of the period. Thursday looks to be the hottest day with a greater than 70% chance of a Moderate Heat Risk. Friday also ke...