Mahnomen, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mahnomen, a community in Carlton County, Minnesota.
Today
72°F
Mostly Sunny
Mostly sunny, with a high near 72. Northwest wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Mahnomen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny | 10 mph NW | 0% |
| Tonight | 50°F | Mostly Clear | 0 to 5 mph W | 0% |
| Wednesday | 76°F | Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 0 to 5 mph SW | 2% |
| Thursday | 82°F | Sunny | 5 to 15 mph SW | 6% |
| Thursday Night | 61°F | Mostly Clear | 5 to 10 mph SW | 4% |
| Friday | 83°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 19% |
| Friday Night | 57°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 29% |
| Saturday | 78°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 20% |
| Saturday Night | 57°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 32% |
| Sunday | 76°F | Slight Chance Showers And Thunderstorms | 5 mph NW | 22% |
| Sunday Night | 57°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 15% |
| Monday | 77°F | Slight Chance Rain Showers | 0 to 5 mph N | 21% |
| Monday Night | 56°F | Slight Chance Rain Showers | 0 to 5 mph N | 20% |
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 Aug 4, 2026.