Last frost date in Duluth, Minnesota
May 14
Average last frost in spring. In an early year (1 in 10) it's over by April 24; in a late year (1 in 10) it comes after June 1.
October 12
Average first frost in fall. 1 year in 10 it comes by September 25.
Source: NOAA U.S. Climate Normals 1991–2020, station Duluth Harbor Stn (USC00212246), 2.1 miles from Duluth, elevation 610 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 24 | May 14 | June 1 |
| First frost in fall | Sept 25 | Oct 12 | Oct 26 |
Frost-free days in an average year: 149
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 31 | Sept 30 |
| Frost (32°F) | Every year | May 14 | Oct 12 |
| Hard freeze (28°F) | Every year | Apr 29 | Oct 25 |
Nights at 32°F or colder in an average year: 166
What to plant now in Duluth
- Spring planting calendar for an average last frost around May 10 Duluth: May 14
- Fall planting calendar for an average first frost around October 10 Duluth: 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 Minnesota
- Hermantown 5 mi · last frost May 18
- Cloquet 18 mi · last frost May 26
- Hibbing 57 mi · last frost June 5
- Grand Rapids 73 mi · last frost May 17
- North Branch 96 mi · last frost May 19
Updated