St. Peter, MN Weather & Growing Conditions
Today
71°F
Chance Showers And Thunderstorms then Partly Sunny
A chance of showers and thunderstorms before 8am. Partly sunny, with a high near 71. Northwest wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Chance Showers And Thunderstorms then Partly Sunny | 10 mph NW | 26% |
| Tonight | 54°F | Partly Cloudy | 5 mph WNW | 11% |
| Wednesday | 74°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 56°F | Mostly Clear | 5 mph SSW | 0% |
| Thursday | 78°F | Sunny | 5 to 10 mph SSW | 1% |
| Thursday Night | 63°F | Mostly Clear | 10 mph S | 4% |
| Friday | 82°F | Sunny | 10 mph SSW | 10% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 21% |
| Saturday | 82°F | Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 10 mph SE | 43% |
| Sunday | 81°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 43% |
| Sunday Night | 65°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph NE | 26% |
| Monday | 80°F | Chance Showers And Thunderstorms | 10 mph ENE | 26% |
| Monday Night | 65°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 20% |
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 Aug 4, 2026.