Last frost date in Mankato, Minnesota
April 30
Average last frost in spring. In an early year (1 in 10) it's over by April 16; in a late year (1 in 10) it comes after May 12.
October 9
Average first frost in fall. 1 year in 10 it comes by September 25.
Source: NOAA U.S. Climate Normals 1991–2020, station Mankato (USC00215073), 2.5 miles from Mankato, elevation 850 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for North Mankato, so its frost dates are the same as Mankato's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 16 | Apr 30 | May 12 |
| First frost in fall | Sept 25 | Oct 9 | Oct 22 |
Frost-free days in an average year: 161
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 8 | Sept 30 |
| Frost (32°F) | Every year | Apr 30 | Oct 9 |
| Hard freeze (28°F) | Every year | Apr 19 | Oct 20 |
Nights at 32°F or colder in an average year: 161
What to plant now in Mankato
- Spring planting calendar for an average last frost around April 30 Mankato: April 30
- Fall planting calendar for an average first frost around October 10 Mankato: October 9
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Minnesota
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