Mahnomen, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mahnomen, a city in Mahnomen County, Minnesota.
Today
71°F
Sunny
Sunny, with a high near 71. West wind 7 to 13 mph.
7-day forecast for Mahnomen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Sunny | 7 to 13 mph W | 0% |
| Tonight | 48°F | Mostly Clear | 2 to 12 mph SW | 0% |
| Wednesday | 78°F | Sunny | 5 to 12 mph SW | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 12 mph SSW | 12% |
| Thursday | 82°F | Sunny | 13 mph SW | 12% |
| Thursday Night | 58°F | Mostly Clear | 7 to 10 mph SW | 6% |
| Friday | 81°F | Sunny | 6 to 12 mph WSW | 8% |
| Friday Night | 54°F | Mostly Clear | 3 to 12 mph NE | 8% |
| Saturday | 79°F | Mostly Sunny | 2 to 10 mph NE | 9% |
| Saturday Night | 56°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 19% |
| Sunday | 77°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 8 mph N | 19% |
| Sunday Night | 56°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 6 to 9 mph NNE | 21% |
| Monday | 77°F | Slight Chance Showers And Thunderstorms | 8 mph NNE | 21% |
| Monday Night | 56°F | Slight Chance Rain Showers | 5 to 9 mph NE | 18% |
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 Aug 4, 2026.