Last frost date in Harrisburg, South Dakota
May 2
Average last frost in spring. In an early year (1 in 10) it's over by April 19; in a late year (1 in 10) it comes after May 15.
October 2
Average first frost in fall. 1 year in 10 it comes by September 19.
Source: NOAA U.S. Climate Normals 1991–2020, station Canton (USC00391392), 10.6 miles from Harrisburg, elevation 1,316 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 19 | May 2 | May 15 |
| First frost in fall | Sept 19 | Oct 2 | Oct 16 |
Frost-free days in an average year: 151
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 12 | Sept 25 |
| Frost (32°F) | Every year | May 2 | Oct 2 |
| Hard freeze (28°F) | Every year | Apr 23 | Oct 11 |
Nights at 32°F or colder in an average year: 160
What to plant now in Harrisburg
- Spring planting calendar for an average last frost around April 30 Harrisburg: May 2
- Fall planting calendar for an average first frost around September 30 Harrisburg: October 2
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
- Sioux Falls 7 mi · last frost Apr 26
- Brandon 13 mi · last frost May 1
- Vermillion 46 mi · last frost May 3
- Yankton 51 mi · last frost Apr 27
- Brookings 60 mi · last frost May 6
Updated