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Town of Addison, WisconsinAddison, WI Weather Forecast
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Addison Weather Forecast
| LATE THIS AFTERNOON | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
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| Mostly Cloudy | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers | Rain Showers | Mostly Sunny | Clear | Partly Sunny | Partly Cloudy | Mostly Sunny | Clear |
| Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 61°FLo: 16°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | |
| POP: 90% | POP: 80% | POP: 80% | POP: 80% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 430 PM CDT Tue Sep 29 2026 
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Issued: 228 PM CDT Tue Sep 29 2026
Key Messages
- Rounds of moderate rain will spread into southern Wisconsin tonight into Wednesday morning, with rounds of moderate to heavy rain at times Wednesday night into Thursday. A few rumbles of thunder may occur as well. The heaviest rainfall should occur toward the Illinois border. Rises in rivers and ponding of water in low lying areas are expected.
- Temperatures will cool to near or slightly below seasonal normal values with the rain, and remain cool this weekend into early next week.
- Hig...