Last frost date in Spencer, Iowa
May 1
Average last frost in spring. In an early year (1 in 10) it's over by April 18; in a late year (1 in 10) it comes after May 14.
October 3
Average first frost in fall. 1 year in 10 it comes by September 20.
Source: NOAA U.S. Climate Normals 1991–2020, station Spencer 1 N (USC00137844), 1.3 miles from Spencer, elevation 1,326 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 18 | May 1 | May 14 |
| First frost in fall | Sept 20 | Oct 3 | Oct 17 |
Frost-free days in an average year: 154
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 10 | Sept 24 |
| Frost (32°F) | Every year | May 1 | Oct 3 |
| Hard freeze (28°F) | Every year | Apr 22 | Oct 14 |
Nights at 32°F or colder in an average year: 161
What to plant now in Spencer
- Spring planting calendar for an average last frost around April 30 Spencer: May 1
- Fall planting calendar for an average first frost around September 30 Spencer: October 3
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
- Storm Lake 35 mi · last frost Apr 25
- Le Mars 57 mi · last frost Apr 30
- Fort Dodge 66 mi · last frost Apr 28
- Carroll 76 mi · last frost Apr 27
- Sioux City 77 mi · last frost Apr 29
Updated