Portage, WI Weather & Growing Conditions
This Afternoon
69°F
Light Rain Likely
Rain likely. Cloudy, with a high near 69. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Light Rain Likely | 10 to 15 mph S | 55% |
| Tonight | 56°F | Light Rain | 10 mph S | 92% |
| Wednesday | 60°F | Light Rain Likely | 10 to 15 mph S | 70% |
| Wednesday Night | 45°F | Light Rain | 10 mph SW | 77% |
| Thursday | 54°F | Light Rain | 5 to 10 mph W | 86% |
| Thursday Night | 37°F | Chance Light Rain then Cloudy | 5 to 10 mph N | 25% |
| Friday | 48°F | Slight Chance Light Rain then Partly Sunny | 5 to 10 mph N | 16% |
| Friday Night | 30°F | Partly Cloudy | 0 mph | 2% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 1% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 7% |
| Sunday | 58°F | Slight Chance Light Rain | 5 to 10 mph W | 17% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 5% |
| Monday | 60°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 38°F | Partly Cloudy | 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portage, WI
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
164 days
Hardiness zone
5a
Explore more for Portage, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Portage Wwtp, Wi (3.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.