Portage, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portage, a city in Kalamazoo County, Michigan.
Overnight
62°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 62, with temperatures rising to around 64 overnight. South wind around 14 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Portage
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Chance Rain Showers | 14 mph S | 33% |
| Wednesday | 69°F | Rain Showers | 12 to 15 mph SSW | 80% |
| Wednesday Night | 47°F | Mostly Cloudy | 8 to 12 mph SW | 11% |
| Thursday | 57°F | Chance Rain Showers | 9 to 13 mph SW | 38% |
| Thursday Night | 41°F | Chance Rain Showers | 5 to 9 mph WNW | 54% |
| Friday | 51°F | Chance Rain Showers | 6 to 10 mph NW | 46% |
| Friday Night | 33°F | Chance Rain Showers then Mostly Cloudy | 3 to 9 mph NNW | 39% |
| Saturday | 51°F | Mostly Sunny | 3 to 8 mph NW | 5% |
| Saturday Night | 31°F | Partly Cloudy | 5 mph WNW | 1% |
| Sunday | 54°F | Mostly Sunny | 2 to 12 mph W | 13% |
| Sunday Night | 34°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 | 4% |
Forecast source: National Weather Service (api.weather.gov) for Portage (42.197, -85.591). Updated through the day.
Growing snapshot for Portage
Last spring frost
Apr 28
First fall frost
Oct 18
Growing season
172 days
Hardiness zone
6a
More local growing data for Portage: nearby ZIP 49024 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Augusta
Climax
Comstock Northwest
Eastwood
Galesburg
Kalamazoo
Parchment
Richland
Schoolcraft
Scotts
Vicksburg
Westwood
Climate data from the nearest NOAA station, Kalamazoo Battle Ck Intl Ap, Mi (3.9 mi from Portage). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.