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Upper Lake Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
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| Isolated Showers | Mostly Cloudy | Chance of Showers | Chance of T-Storm | Partly Sunny | Partly Cloudy | Clear | Clear | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 60°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C |
| POP: 20% | POP: 100% | POP: 100% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 AM EDT Tue Sep 08 2026 
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Issued: 718 AM EDT Tue Sep 8 2026
Key Messages
As of 216 AM EDT Tuesday...
1. Mostly dry and seasonable weather is expected today and tonight, then more widespread precipitation arrives Wednesday into Wednesday night.
2. High pressure will bring another stretch of dry and pleasant weather to start the weekend.
Discussion
... As of 216 AM EDT Tuesday...
KEY MESSAGE 1: A dying cold front will come through early this morning and bring a few light showers, but weak forcing and dry low levels will minimize the impacts. Ridging will become ...