Last frost date in Yankton, South Dakota
April 27
Average last frost in spring. In an early year (1 in 10) it's over by April 13; in a late year (1 in 10) it comes after May 10.
October 11
Average first frost in fall. 1 year in 10 it comes by September 27.
Source: NOAA U.S. Climate Normals 1991–2020, station Yankton 2 E (USW00094911), 1.7 miles from Yankton, elevation 1,180 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 13 | Apr 27 | May 10 |
| First frost in fall | Sept 27 | Oct 11 | Oct 23 |
Frost-free days in an average year: 164
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 6 | Oct 1 |
| Frost (32°F) | Every year | Apr 27 | Oct 11 |
| Hard freeze (28°F) | Every year | Apr 18 | Oct 21 |
Nights at 32°F or colder in an average year: 158
What to plant now in Yankton
- Spring planting calendar for an average last frost around April 30 Yankton: April 27
- Fall planting calendar for an average first frost around October 10 Yankton: October 11
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 South Dakota
- Vermillion 25 mi · last frost May 3
- Harrisburg 51 mi · last frost May 2
- Sioux Falls 56 mi · last frost Apr 26
- Brandon 63 mi · last frost May 1
- Mitchell 66 mi · last frost May 2
Updated