Last frost date in Dubuque, Iowa
April 19
Average last frost in spring. In an early year (1 in 10) it's over by April 4; in a late year (1 in 10) it comes after May 4.
October 21
Average first frost in fall. 1 year in 10 it comes by October 7.
Source: NOAA U.S. Climate Normals 1991–2020, station Dubuque L&d 11 (USC00132364), 4.2 miles from Dubuque, elevation 620 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 4 | Apr 19 | May 4 |
| First frost in fall | Oct 7 | Oct 21 | Nov 2 |
Frost-free days in an average year: 184
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 1 | Oct 12 |
| Frost (32°F) | Every year | Apr 19 | Oct 21 |
| Hard freeze (28°F) | Every year | Apr 7 | Nov 1 |
Nights at 32°F or colder in an average year: 133
What to plant now in Dubuque
- Spring planting calendar for an average last frost around April 20 Dubuque: April 19
- Fall planting calendar for an average first frost around October 20 Dubuque: October 21
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
- Clinton 51 mi · last frost Apr 22
- Marion 55 mi · last frost Apr 28
- Cedar Rapids 62 mi · last frost Apr 27
- Davenport 65 mi · last frost Apr 19
- Bettendorf 65 mi · last frost Apr 16
Updated