Last frost date in Le Mars, Iowa
April 30
Average last frost in spring. In an early year (1 in 10) it's over by April 17; in a late year (1 in 10) it comes after May 12.
October 4
Average first frost in fall. 1 year in 10 it comes by September 21.
Source: NOAA U.S. Climate Normals 1991–2020, station Le Mars (USC00134735), 1.4 miles from Le Mars, elevation 1,195 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 17 | Apr 30 | May 12 |
| First frost in fall | Sept 21 | Oct 4 | Oct 19 |
Frost-free days in an average year: 157
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 9 | Sept 27 |
| Frost (32°F) | Every year | Apr 30 | Oct 4 |
| Hard freeze (28°F) | Every year | Apr 20 | Oct 16 |
Nights at 32°F or colder in an average year: 160
What to plant now in Le Mars
- Spring planting calendar for an average last frost around April 30 Le Mars: April 30
- Fall planting calendar for an average first frost around September 30 Le Mars: October 4
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
- Sioux City 23 mi · last frost Apr 29
- Storm Lake 51 mi · last frost Apr 25
- Spencer 57 mi · last frost May 1
- Carroll 83 mi · last frost Apr 27
- Fort Dodge 103 mi · last frost Apr 28
Updated