Mankato, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mankato, a city in Blue Earth County, Minnesota.
Tonight
46°F
Rain
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 for Mankato
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Rain | 10 mph NNW | 99% |
| Wednesday | 50°F | Light Rain | 10 to 15 mph WNW | 97% |
| Wednesday Night | 42°F | Light Rain | 10 to 15 mph NW | 100% |
| Thursday | 48°F | Chance Light Rain | 10 to 15 mph NNW | 50% |
| Thursday Night | 35°F | Mostly Cloudy | 5 to 10 mph N | 5% |
| Friday | 46°F | Mostly Sunny | 0 to 5 mph NNE | 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 | 4% |
| Sunday | 57°F | Sunny | 5 mph W | 4% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SSW | 0% |
| Monday | 60°F | Mostly Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 mph WNW | 1% |
| Tuesday | 56°F | Mostly Sunny | 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Mankato (44.171, -93.976). Updated through the day.
Growing snapshot for Mankato
Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
161 days
Hardiness zone
5a
More local growing data for Mankato: nearby ZIP 56001 weather · frost dates · planting calendar · Minnesota frost dates
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St. Clair
Vernon Center
Climate data from the nearest NOAA station, Mankato, Mn (2.8 mi from Mankato). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.