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Upper Island Lake, WI 7-Day Weather Forecast
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Upper Island Lake Weather Forecast
Upper Island Lake, WI Weather Forecast Date: 122 AM CDT Tue Aug 18 2026
Weather forecast for Upper Island Lake, WI
Tonight Lo: 60°F Lo: 16°C |
Tonight... Mostly cloudy with a chance of showers and thunderstorms. Nearly steady temperature in the lower 60s. Light and variable wind. Chance of rain 30%. |
Tue Hi: 79°FHi: 26°C Lo: 50°F Lo: 10°C |
Tuesday... Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 70s. West wind 5 to 10 mph. Chance of rain 50%. |
Wed Hi: 79°FHi: 26°C Lo: 51°F Lo: 11°C |
Wednesday... Mostly sunny. Highs in the upper 70s. Light and variable wind becoming northwest around 5 mph in the afternoon. |
| Thu Hi: 81°FHi: 27°C Lo: 59°F Lo: 15°C |
Thursday... Mostly sunny. Highs in the lower 80s. |
| Fri Hi: 80°FHi: 27°C Lo: 55°F Lo: 13°C |
Friday... Partly sunny with a 50% chance of showers and thunderstorms. Highs around 80. |
| Sat Hi: 79°FHi: 26°C Lo: 55°F Lo: 13°C |
Saturday... Mostly clear. Lows in the middle 50s. Highs in the upper 70s. |
| Sun Hi: 79°FHi: 26°C Lo: 55°F Lo: 13°C |
Sunday... Mostly clear. Lows in the middle 50s. Highs in the upper 70s. |
| Sun Hi: 79°FHi: 26°C Lo: 51°F Lo: 11°C |
Sunday... Mostly clear. Lows in the middle 50s. Highs in the upper 70s. |
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