Last frost date in Marion, Iowa
April 28
Average last frost in spring. In an early year (1 in 10) it's over by April 14; in a late year (1 in 10) it comes after May 13.
October 12
Average first frost in fall. 1 year in 10 it comes by September 29.
Source: NOAA U.S. Climate Normals 1991–2020, station Cedar Rapids #1 (USC00131319), 0.4 miles from Marion, elevation 813 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 14 | Apr 28 | May 13 |
| First frost in fall | Sept 29 | Oct 12 | Oct 25 |
Frost-free days in an average year: 166
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 7 | Oct 2 |
| Frost (32°F) | Every year | Apr 28 | Oct 12 |
| Hard freeze (28°F) | Every year | Apr 17 | Oct 22 |
Nights at 32°F or colder in an average year: 134
What to plant now in Marion
- Spring planting calendar for an average last frost around April 30 Marion: April 28
- Fall planting calendar for an average first frost around October 10 Marion: October 12
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
- Cedar Rapids 7 mi · last frost Apr 27
- Iowa City 27 mi · last frost Apr 21
- Waterloo 50 mi · last frost Apr 27
- Muscatine 51 mi · last frost Apr 24
- Dubuque 55 mi · last frost Apr 19
Updated