Last frost date in Aberdeen, South Dakota
May 8
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 21.
September 29
Average first frost in fall. 1 year in 10 it comes by September 17.
Source: NOAA U.S. Climate Normals 1991–2020, station Aberdeen 3 E (USC00390022), 2.7 miles from Aberdeen, elevation 1,301 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 8 | May 21 |
| First frost in fall | Sept 17 | Sept 29 | Oct 11 |
Frost-free days in an average year: 144
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 18 | Sept 21 |
| Frost (32°F) | Every year | May 8 | Sept 29 |
| Hard freeze (28°F) | Every year | Apr 29 | Oct 7 |
Nights at 32°F or colder in an average year: 180
What to plant now in Aberdeen
- Spring planting calendar for an average last frost around May 10 Aberdeen: May 8
- Fall planting calendar for an average first frost around September 30 Aberdeen: September 29
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
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