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.
This Afternoon
62°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a high near 62. East wind around 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for St. Peter
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Showers And Thunderstorms | 15 mph E | 82% |
| Tonight | 58°F | Showers And Thunderstorms | 10 to 15 mph E | 89% |
| Saturday | 65°F | Chance Rain Showers then Drizzle Likely | 5 to 10 mph NE | 56% |
| Saturday Night | 54°F | Slight Chance Drizzle then Mostly Cloudy | 5 to 10 mph NNE | 18% |
| Sunday | 68°F | Partly Sunny | 10 to 15 mph NE | 3% |
| Sunday Night | 50°F | Mostly Cloudy | 5 to 10 mph ENE | 12% |
| Monday | 63°F | Chance Rain Showers | 10 mph ENE | 33% |
| Monday Night | 46°F | Chance Rain Showers then Mostly Cloudy | 5 mph ENE | 33% |
| Tuesday | 64°F | Mostly Sunny | 5 mph E | 5% |
| Tuesday Night | 45°F | Mostly Clear | 0 to 5 mph ESE | 0% |
| Wednesday | 66°F | Sunny | 0 to 5 mph SE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 0 to 5 mph SSE | 13% |
| Thursday | 70°F | Mostly Sunny | 0 to 5 mph SSE | 13% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph SSE | 6% |
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 Sep 18, 2026.