Last frost date in Oskaloosa, Iowa
April 21
Average last frost in spring. In an early year (1 in 10) it's over by April 8; in a late year (1 in 10) it comes after May 4.
October 16
Average first frost in fall. 1 year in 10 it comes by September 29.
Source: NOAA U.S. Climate Normals 1991–2020, station Oskaloosa (USC00136327), 2 miles from Oskaloosa, elevation 830 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 8 | Apr 21 | May 4 |
| First frost in fall | Sept 29 | Oct 16 | Oct 29 |
Frost-free days in an average year: 176
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 1 | Oct 4 |
| Frost (32°F) | Every year | Apr 21 | Oct 16 |
| Hard freeze (28°F) | Every year | Apr 11 | Oct 27 |
Nights at 32°F or colder in an average year: 144
What to plant now in Oskaloosa
- Spring planting calendar for an average last frost around April 20 Oskaloosa: April 21
- Fall planting calendar for an average first frost around October 20 Oskaloosa: October 16
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 Iowa
- Pella 16 mi · last frost Apr 20
- Ottumwa 22 mi · last frost Apr 23
- Newton 35 mi · last frost Apr 22
- Indianola 48 mi · last frost Apr 24
- Marshalltown 53 mi · last frost Apr 28
Updated