Last frost date in Worthington, Minnesota
May 3
Average last frost in spring. In an early year (1 in 10) it's over by April 19; in a late year (1 in 10) it comes after May 15.
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 Worthington 2 Nne (USC00219170), 1.5 miles from Worthington, elevation 1,570 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 19 | May 3 | May 15 |
| First frost in fall | Sept 21 | Oct 4 | Oct 18 |
Frost-free days in an average year: 153
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 12 | Sept 25 |
| Frost (32°F) | Every year | May 3 | Oct 4 |
| Hard freeze (28°F) | Every year | Apr 23 | Oct 15 |
Nights at 32°F or colder in an average year: 167
What to plant now in Worthington
- Spring planting calendar for an average last frost around April 30 Worthington: May 3
- Fall planting calendar for an average first frost around September 30 Worthington: 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.