Portage, MI Weather & Growing Conditions
Overnight
61°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. Low around 61, with temperatures rising to around 65 overnight. Southeast wind around 3 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Showers And Thunderstorms | 3 mph SE | 87% |
| Sunday | 68°F | Showers And Thunderstorms | 5 to 12 mph NE | 80% |
| Sunday Night | 48°F | Mostly Cloudy | 8 to 12 mph NE | 9% |
| Monday | 64°F | Slight Chance Rain Showers | 12 mph ENE | 24% |
| Monday Night | 46°F | Mostly Cloudy | 8 to 12 mph ENE | 14% |
| Tuesday | 62°F | Partly Sunny | 9 to 13 mph NE | 13% |
| Tuesday Night | 48°F | Mostly Cloudy then Slight Chance Rain Showers | 8 to 13 mph NE | 16% |
| Wednesday | 62°F | Chance Rain Showers | 12 mph NE | 37% |
| Wednesday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 6 to 12 mph ENE | 37% |
| Thursday | 66°F | Partly Sunny | 6 to 9 mph ENE | 7% |
| Thursday Night | 49°F | Mostly Cloudy | 2 to 7 mph ENE | 7% |
| Friday | 69°F | Partly Sunny | 2 to 7 mph NE | 4% |
| Friday Night | 48°F | Partly Cloudy | 2 to 6 mph NE | 4% |
| Saturday | 71°F | Sunny | 2 to 6 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portage, MI
Last spring frost
Apr 28
First fall frost
Oct 18
Growing season
172 days
Hardiness zone
6a
Explore more for Portage, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Kalamazoo Battle Ck Intl Ap, Mi (2.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.