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Upper Lake, WI Weather Forecast
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Upper Lake Weather Forecast
| THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  |  | |  |  |  |  | | |  |
| Partly Cloudy | Partly Cloudy | Chance of Showers | Mostly Cloudy | Partly Cloudy | Clear | Chance of Showers | Showers | Partly Sunny | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Hi: 69°FHi: 21°C Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 45°FLo: 7°C | Lo: 49°FLo: 9°C |
| POP: 20% | POP: 50% | POP: 100% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 122 PM CDT Fri Sep 11 2026 
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Issued: 228 PM CDT Fri Sep 11 2026
Key Messages
- Chances for storms return late tonight into Saturday morning, mainly in north-central WI. Severe weather threat is very low, but brief gusty winds are possible.
- A round or two of heavy rain and storms is possible Monday into Tuesday. The severe weather threat is low.
- Gusty south-southwest winds will generate high waves along Lake Michigan this afternoon through Saturday morning, causing hazardous conditions to small craft and dangerous swimming conditions at Lake Michigan beaches.