Last frost date in Brookings, South Dakota
May 6
Average last frost in spring. In an early year (1 in 10) it's over by April 25; in a late year (1 in 10) it comes after May 19.
October 1
Average first frost in fall. 1 year in 10 it comes by September 17.
Source: NOAA U.S. Climate Normals 1991–2020, station Brookings 2 NE (USC00391076), 1.8 miles from Brookings, elevation 1,639 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 25 | May 6 | May 19 |
| First frost in fall | Sept 17 | Oct 1 | Oct 13 |
Frost-free days in an average year: 145
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 15 | Sept 22 |
| Frost (32°F) | Every year | May 6 | Oct 1 |
| Hard freeze (28°F) | Every year | Apr 28 | Oct 8 |
Nights at 32°F or colder in an average year: 177
What to plant now in Brookings
- Spring planting calendar for an average last frost around May 10 Brookings: May 6
- Fall planting calendar for an average first frost around September 30 Brookings: October 1
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
- Watertown 46 mi · last frost May 7
- Brandon 50 mi · last frost May 1
- Sioux Falls 53 mi · last frost Apr 26
- Harrisburg 60 mi · last frost May 2
- Huron 70 mi · last frost May 6
Updated