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City of Jefferson, WIJefferson, WI Weather Forecast
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Jefferson Weather Forecast
| LATE THIS AFTERNOON | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  |  |  |  | | | | | |
| Sunny | Mostly Clear | Chance of Showers | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of T-Storm | Showers Likely |
| Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | |
| POP: 40% | POP: 80% | POP: 80% | POP: 20% | POP: 60% | POP: 70% | POP: 40% | POP: 30% | POP: 50% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 431 PM CDT Sun Sep 13 2026 
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Issued: 228 PM CDT Sun Sep 13 2026
Key Messages
- Light rain has ended over far srn WI.
- Widespread showers and scattered thunderstorms are forecast Monday night into Tuesday morning. Locally heavy rain and urban and small stream flooding are possible.
- Gales are possible Monday night into Tuesday morning across the Lake Michigan open waters as increasing south winds develop. A Gale Watch has been issued for much of the open waters of Lake Michigan, and for the nearshore zones north of North Point Lighthouse. A Small Craft Advisory is...