St. Peter, MN Weather & Growing Conditions
This Afternoon
65°F
Slight Chance Drizzle
A slight chance of drizzle before 4pm. Cloudy, with a high near 65. North northeast wind around 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Slight Chance Drizzle | 10 mph NNE | 18% |
| Tonight | 54°F | Mostly Cloudy | 10 mph NNE | 7% |
| Sunday | 69°F | Partly Sunny | 10 to 15 mph NE | 2% |
| Sunday Night | 51°F | Cloudy | 10 mph NE | 3% |
| Monday | 61°F | Slight Chance Rain Showers | 5 to 10 mph ENE | 15% |
| Monday Night | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph ENE | 15% |
| Tuesday | 64°F | Mostly Sunny | 5 to 10 mph E | 3% |
| Tuesday Night | 44°F | Mostly Clear | 5 mph ESE | 0% |
| Wednesday | 68°F | Sunny | 5 to 10 mph SE | 0% |
| Wednesday Night | 50°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SE | 17% |
| Thursday | 69°F | Chance Rain Showers | 5 to 10 mph SSE | 34% |
| Thursday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph SE | 24% |
| Friday | 74°F | Partly Sunny | 5 mph SE | 12% |
| Friday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SE | 15% |
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 Sep 19, 2026.