St. Peter, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Peter, a city in Le Sueur County, Minnesota.
Overnight
63°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy. Low around 63, with temperatures rising to around 66 overnight. Northwest wind around 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for St. Peter
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Chance Showers And Thunderstorms | 15 mph NW | 44% |
| Tuesday | 72°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 10 mph NW | 21% |
| Tuesday Night | 54°F | Partly Cloudy | 0 to 5 mph WNW | 12% |
| Wednesday | 74°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 56°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Thursday | 78°F | Sunny | 5 to 10 mph SSW | 1% |
| Thursday Night | 63°F | Mostly Clear | 5 to 10 mph S | 4% |
| Friday | 82°F | Sunny | 5 to 10 mph SSW | 10% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 22% |
| Saturday | 82°F | Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 44% |
| Sunday | 81°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 44% |
| Sunday Night | 65°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph NE | 27% |
| Monday | 80°F | Chance Showers And Thunderstorms | 5 to 10 mph ENE | 27% |
Forecast source: National Weather Service (api.weather.gov) for St. Peter (44.329, -93.968). Updated through the day.
Growing snapshot for St. Peter
Last spring frost
May 2
First fall frost
Oct 4
Growing season
153 days
Hardiness zone
5a
More local growing data for St. Peter: nearby ZIP 56050 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, St Peter, Mn (4.4 mi from St. Peter). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.