Mahnomen, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mahnomen, a city in Mahnomen County, Minnesota.
Tonight
50°F
Mostly Cloudy
Mostly cloudy. Low around 50, with temperatures rising to around 52 overnight. East wind 5 to 9 mph.
7-day forecast for Mahnomen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Cloudy | 5 to 9 mph E | 3% |
| Saturday | 69°F | Mostly Cloudy | 3 to 9 mph NE | 2% |
| Saturday Night | 48°F | Mostly Cloudy | 9 mph NE | 0% |
| Sunday | 66°F | Partly Sunny | 7 to 10 mph ENE | 0% |
| Sunday Night | 43°F | Mostly Cloudy | 8 mph E | 0% |
| Monday | 66°F | Mostly Sunny | 7 mph ESE | 1% |
| Monday Night | 41°F | Mostly Clear | 7 mph SE | 1% |
| Tuesday | 66°F | Sunny | 7 to 10 mph SE | 0% |
| Tuesday Night | 44°F | Mostly Clear | 9 mph SSE | 1% |
| Wednesday | 67°F | Mostly Sunny | 10 to 15 mph SSE | 6% |
| Wednesday Night | 48°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph SSE | 16% |
| Thursday | 70°F | Slight Chance Rain Showers then Partly Sunny | 10 mph S | 16% |
| Thursday Night | 50°F | Partly Cloudy | 8 mph SSE | 8% |
| Friday | 72°F | Mostly Sunny | 6 to 12 mph SSE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Mahnomen (47.315, -95.967). Updated through the day.
Growing snapshot for Mahnomen
Last spring frost
May 7
First fall frost
Sep 28
Growing season
143 days
Hardiness zone
4a
More local growing data for Mahnomen: nearby ZIP 56516 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Beaulieu
Bejou
Ebro
Elbow Lake
Lengby
Midway
Naytahwaush
Pine Bend
Riverland
Roy Lake
The Ranch
Twin Lakes
West Roy Lake
Climate data from the nearest NOAA station, Mahnomen, Mn (8.8 mi from Mahnomen). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.