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Portage, WI Weather Forecast
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| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  | | | | | | | |  | | |
| Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear |
| Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 731 AM CDT Sun Oct 04 2026 
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Issued: 600 AM CDT Sun Oct 4 2026
Key Messages
- Patchy frost possible tonight.
- Pleasant Autumn weather for the new week. High temps are expected to reach the lower 70s for Tuesday and again late in the week.
Aviation
... Issued 600 AM CDT Sun Oct 4 2026
VFR conditions are expected through the period. There is a chance for some fair weather cumulus clouds to develop this afternoon around 3-5 kft. Otherwise clear skies are expected. The light west to southwest winds this morning will shift to northwesterly and become breezy behind a pa...