Mankato, MN Weather & Growing Conditions
Tonight
46°F
Rain
Rain before 7pm, then rain and patchy fog. Cloudy. Low around 46, with temperatures rising to around 49 overnight. North northwest wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Rain | 10 mph NNW | 97% |
| Wednesday | 51°F | Rain | 10 to 15 mph NW | 95% |
| Wednesday Night | 42°F | Light Rain | 10 to 15 mph NW | 100% |
| Thursday | 48°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph NNW | 49% |
| Thursday Night | 34°F | Mostly Cloudy | 5 to 10 mph N | 4% |
| Friday | 46°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Friday Night | 30°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph SW | 1% |
| Saturday Night | 35°F | Partly Cloudy | 5 mph WSW | 5% |
| Sunday | 57°F | Sunny | 5 mph W | 5% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SSW | 0% |
| Monday | 60°F | Mostly Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 mph WNW | 1% |
| Tuesday | 55°F | Mostly Sunny | 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mankato, MN
Last spring frost
May 2
First fall frost
Oct 4
Growing season
153 days
Hardiness zone
5a
Explore more for Mankato, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, St Peter, Mn (4.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.