Last frost date in Newton, Iowa
April 22
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 17
Average first frost in fall. 1 year in 10 it comes by October 1.
Source: NOAA U.S. Climate Normals 1991–2020, station Newton (USC00135992), 1.2 miles from Newton, elevation 960 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 22 | May 4 |
| First frost in fall | Oct 1 | Oct 17 | Oct 28 |
Frost-free days in an average year: 174
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 2 | Oct 4 |
| Frost (32°F) | Every year | Apr 22 | Oct 17 |
| Hard freeze (28°F) | Every year | Apr 12 | Oct 26 |
Nights at 32°F or colder in an average year: 142
What to plant now in Newton
- Spring planting calendar for an average last frost around April 20 Newton: April 22
- Fall planting calendar for an average first frost around October 20 Newton: October 17
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 21 mi · last frost Apr 20
- Marshalltown 24 mi · last frost Apr 28
- Ankeny 29 mi · last frost Apr 23
- Des Moines 31 mi · last frost Apr 18
- Oskaloosa 35 mi · last frost Apr 21
Updated