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Lake Arrowhead Weather Forecast
| THIS AFTERNOON | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  |  |  |  |  |  |  | | | | |
| Partly Sunny | Partly Cloudy | Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Mostly Cloudy | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Partly Cloudy |
| Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 60°FHi: 16°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C |
| POP: 100% | POP: 100% | POP: 100% | POP: 50% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 121 PM CDT Thu Sep 17 2026 
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Issued: 145 PM CDT Thu Sep 17 2026
Key Messages
- Isolated light showers are possible through this afternoon (10-15%), mainly south of I-90.
- Widespread rainfall is expected Friday into Saturday, heavy at times, with totals of 1-3 inches expected (30-60%) and amounts of 4+ inches possible. Localized flooding and river rises are expected where the heaviest rainfall occurs.
- Additional rainfall chances continue into the new week (20-50%) with cooler than normal temperatures expected.
Discussion
... Issued at 143 PM CDT Thu Sep 17 2026
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