Mahnomen, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mahnomen, a community in Carlton County, Minnesota.
This Afternoon
57°F
Rain
Patchy fog and a slight chance of rain before 2pm, then rain and patchy fog. Cloudy. High near 57, with temperatures falling to around 54 in the afternoon. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Mahnomen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 57°F | Rain | 10 mph N | 78% |
| Tonight | 49°F | Rain | 5 to 10 mph N | 89% |
| Wednesday | 51°F | Rain | 10 mph N | 91% |
| Wednesday Night | 39°F | Light Rain | 10 to 15 mph N | 89% |
| Thursday | 42°F | Slight Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 21% |
| Thursday Night | 27°F | Mostly Cloudy | 0 to 5 mph NE | 0% |
| Friday | 40°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Friday Night | 25°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 47°F | Mostly Sunny | 0 to 5 mph SW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph W | 13% |
| Sunday | 50°F | Mostly Sunny | 5 to 10 mph W | 8% |
| Sunday Night | 32°F | Partly Cloudy | 5 mph SW | 2% |
| Monday | 52°F | Mostly Sunny | 5 to 10 mph SW | 2% |
| Monday Night | 34°F | Partly Cloudy | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Mahnomen (46.773, -92.542). Updated through the day.
Growing snapshot for Mahnomen
Last spring frost
May 26
First fall frost
Sep 23
Growing season
118 days
Hardiness zone
4a
More local growing data for Mahnomen: nearby ZIP 55720 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Barnum
Big Lake
Carlton
Cloquet
Cromwell
Esko
Kettle River
Mahtowa
Moose Lake
Scanlon
Sturgeon Lake
Wrenshall
Wright
Climate data from the nearest NOAA station, Cloquet, Mn (3.2 mi from Mahnomen). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.