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Three Island Lake, CA Weather Forecast
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Three Island Lake Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | MONDAY | TUESDAY | WEDNESDAY |
 |  |  |  |  | | | |  | |
| Chance of T-Storm | Chance of T-Storm | Snow and Rain | Mostly Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy |
| Lo: 33°FLo: 1°C | Hi: 39°FHi: 4°C | Lo: 29°FLo: -2°C | Hi: 43°FHi: 6°C | Lo: 28°FLo: -2°C | Hi: 50°FHi: 10°C Lo: 32°FLo: 0°C | Hi: 50°FHi: 10°C Lo: 32°FLo: 0°C | Hi: 50°FHi: 10°C Lo: 32°FLo: 0°C | Hi: 50°FHi: 10°C Lo: 34°FLo: 1°C | Hi: 50°FHi: 10°C Lo: 34°FLo: 1°C |
| POP: 100% | POP: 100% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 310 PM PDT Wed Oct 21 2026 
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Issued: 535 PM PDT Wed Oct 21 2026
Key Messages
1. There is a high confidence in a significant change in the overall weather pattern with temperatures continuing to cool down and precipitation today through Thursday evening.
2. The first wetting rainfall throughout the entire area is very likely today with a 55-65% chance of at least a half an inch of rainfall by Thursday evening.
3. Snowfall is likely above 8,000 feet in elevation with a 60-70% chance of at least 4 inches of snowfall (probabilities increase further at higher elevat...