Fairmont, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairmont, a city in Martin County, Minnesota.
Today
72°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3pm, then patchy smoke and a chance of showers and thunderstorms. Mostly cloudy, with a high near 72. North northwest wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Fairmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Chance Showers And Thunderstorms | 10 to 15 mph NNW | 30% |
| Tonight | 55°F | Patchy Smoke then Mostly Cloudy | 5 to 10 mph NW | 27% |
| Wednesday | 74°F | Mostly Sunny | 0 to 5 mph SE | 1% |
| Wednesday Night | 55°F | Mostly Clear | 5 mph S | 0% |
| Thursday | 80°F | Sunny | 5 to 10 mph SSW | 1% |
| Thursday Night | 62°F | Mostly Clear | 10 mph S | 3% |
| Friday | 84°F | Sunny | 10 to 15 mph SSW | 13% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph S | 21% |
| Saturday | 85°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 15 mph S | 19% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 to 15 mph SSE | 34% |
| Sunday | 83°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SE | 33% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 31% |
| Monday | 82°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 31% |
| Monday Night | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 to 15 mph NE | 27% |
Forecast source: National Weather Service (api.weather.gov) for Fairmont (43.645, -94.464). Updated through the day.
Growing snapshot for Fairmont
Last spring frost
Apr 25
First fall frost
Oct 14
Growing season
171 days
Hardiness zone
5a
More local growing data for Fairmont: nearby ZIP 56031 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Fairmont, Mn (1.2 mi from Fairmont). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.