Portage, MI Weather & Growing Conditions
Today
68°F
Rain Showers Likely
Rain showers likely. Mostly cloudy. High near 68, with temperatures falling to around 64 in the afternoon. South southwest wind 12 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Rain Showers Likely | 12 to 15 mph SSW | 66% |
| Tonight | 47°F | Mostly Cloudy | 8 to 12 mph SW | 11% |
| Thursday | 57°F | Chance Rain Showers | 9 to 13 mph SW | 39% |
| Thursday Night | 40°F | Rain Showers Likely | 5 to 9 mph WNW | 55% |
| Friday | 51°F | Chance Rain Showers | 6 to 10 mph NNW | 46% |
| Friday Night | 33°F | Chance Rain Showers then Mostly Cloudy | 3 to 9 mph NNW | 40% |
| Saturday | 51°F | Mostly Sunny | 3 to 8 mph NW | 5% |
| Saturday Night | 31°F | Partly Cloudy | 2 to 6 mph WNW | 1% |
| Sunday | 54°F | Mostly Sunny | 2 to 12 mph W | 13% |
| Sunday Night | 33°F | Mostly Clear | 3 to 7 mph W | 13% |
| Monday | 59°F | Sunny | 2 to 9 mph WSW | 4% |
| Monday Night | 38°F | Mostly Clear | 7 mph SW | 1% |
| Tuesday | 60°F | Mostly Sunny | 5 to 10 mph W | 5% |
| Tuesday Night | 35°F | Partly Cloudy | 1 to 6 mph NW | 5% |
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 (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.