Mahnomen, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mahnomen, a city in Mahnomen County, Minnesota.
This Afternoon
48°F
Slight Chance Drizzle
A slight chance of drizzle. Cloudy. High near 48, with temperatures falling to around 43 in the afternoon. North wind around 16 mph.
7-day forecast for Mahnomen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Slight Chance Drizzle | 16 mph N | 11% |
| Tonight | 38°F | Light Rain Likely | 12 to 15 mph N | 68% |
| Wednesday | 46°F | Light Rain Likely | 15 to 18 mph N | 64% |
| Wednesday Night | 30°F | Mostly Cloudy | 12 to 16 mph N | 7% |
| Thursday | 41°F | Mostly Cloudy | 8 to 14 mph NNE | 0% |
| Thursday Night | 24°F | Partly Cloudy | 1 to 6 mph E | 0% |
| Friday | 43°F | Mostly Sunny | 2 to 7 mph S | 0% |
| Friday Night | 27°F | Partly Cloudy | 5 to 8 mph SSW | 0% |
| Saturday | 51°F | Mostly Sunny | 8 to 13 mph SW | 8% |
| Saturday Night | 31°F | Slight Chance Light Rain then Partly Cloudy | 5 to 8 mph W | 15% |
| Sunday | 52°F | Mostly Sunny | 5 to 9 mph WSW | 4% |
| Sunday Night | 34°F | Partly Cloudy | 6 to 9 mph SSW | 2% |
| Monday | 54°F | Mostly Sunny | 9 to 17 mph WSW | 1% |
| Monday Night | 32°F | Mostly Clear | 5 to 9 mph W | 0% |
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 Nov 4, 2026.