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City of Montello, WIMontello, WI Weather Forecast
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Montello Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 | |  |  | |  |  |  | | |  | |
| Patchy Fog | Patchy Fog | Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of T-Storm | Showers | Partly Cloudy | Mostly Sunny | Mostly Clear | Mostly Sunny |
| Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C |
| POP: 30% | POP: 80% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 731 PM CDT Sat Sep 05 2026 
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Issued: 606 PM CDT Sat Sep 5 2026
Key Messages
- Patchy dense fog possible over south central WI for early Sunday morning, especially in the WI River and Baraboo River Valleys.
- Mild and pleasant for Sunday and Labor Day.
- Warmer temps and high humidity returns for Tuesday and Wednesday along with 50-80% chances for showers and thunderstorms Tuesday night.
Aviation
... Issued 605 PM CDT Sat Sep 5 2026
Quiet conditions expected through the TAF period for the most part though some patchy dense fog will be possible late tonight into early ...