St. Martin, MN Weather & Growing Conditions
Tonight
45°F
Rain
Rain and patchy fog. Cloudy. Low around 45, with temperatures rising to around 48 overnight. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 45°F | Rain | 15 mph N | 100% |
| Wednesday | 50°F | Rain | 15 mph N | 96% |
| Wednesday Night | 39°F | Light Rain | 15 mph NNW | 99% |
| Thursday | 45°F | Mostly Cloudy | 10 to 15 mph N | 11% |
| Thursday Night | 31°F | Mostly Cloudy | 0 to 10 mph NNE | 0% |
| Friday | 42°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 29°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 51°F | Mostly Sunny | 0 to 10 mph SW | 3% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph W | 7% |
| Sunday | 54°F | Mostly Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 35°F | Partly Cloudy | 5 mph SSW | 0% |
| Monday | 55°F | Mostly Sunny | 5 to 10 mph WSW | 1% |
| Monday Night | 36°F | Mostly Clear | 5 to 10 mph WNW | 1% |
| Tuesday | 51°F | Mostly Sunny | 5 to 10 mph WNW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Martin, MN
Last spring frost
May 4
First fall frost
Oct 1
Growing season
148 days
Hardiness zone
4b
Explore more for St. Martin, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Melrose, Mn (13.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.