St. Peter, MN Weather & Growing Conditions
Today
49°F
Light Rain
Rain. Cloudy, with a high near 49. West wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 49°F | Light Rain | 15 mph W | 91% |
| Tonight | 41°F | Light Rain | 15 mph NW | 94% |
| Thursday | 46°F | Cloudy | 10 to 15 mph NNW | 8% |
| Thursday Night | 30°F | Mostly Cloudy then Patchy Fog | 5 to 10 mph N | 0% |
| Friday | 45°F | Patchy Fog then Sunny | 0 to 5 mph NNE | 0% |
| Friday Night | 27°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Saturday | 51°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
| Saturday Night | 35°F | Mostly Clear | 5 mph WSW | 2% |
| Sunday | 54°F | Sunny | 5 mph W | 2% |
| Sunday Night | 36°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 60°F | Mostly Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 56°F | Sunny | 5 mph WNW | 1% |
| Tuesday Night | 38°F | Partly Cloudy | 0 to 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Peter, MN
Last spring frost
May 2
First fall frost
Oct 4
Growing season
153 days
Hardiness zone
4b
Explore more for St. Peter, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, St Peter, Mn (4.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.