Last frost date in Wilmington, Delaware
April 7
Average last frost in spring. In an early year (1 in 10) it's over by March 26; in a late year (1 in 10) it comes after April 24.
November 4
Average first frost in fall. 1 year in 10 it comes by October 21.
Source: NOAA U.S. Climate Normals 1991–2020, station Wilmington Porter Rsch (USC00079605), 2.7 miles from Wilmington, elevation 270 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 26 | Apr 7 | Apr 24 |
| First frost in fall | Oct 21 | Nov 4 | Nov 19 |
Frost-free days in an average year: 209
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 20 | Oct 24 |
| Frost (32°F) | Every year | Apr 7 | Nov 4 |
| Hard freeze (28°F) | Every year | Mar 29 | Nov 15 |
Nights at 32°F or colder in an average year: 87
What to plant now in Wilmington
- Corn saladSept 15 – Nov 1Now
- Upland cressSept 15 – Nov 1Now
- Rhubarb plantsNov 1 – Dec 1Soon
- Asparagus plantsNov 15 – Jan 1Soon
- Spring planting calendar for an average last frost around April 10 Wilmington: April 7
- Fall planting calendar for an average first frost around October 30 Wilmington: November 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.
Nearby in Delaware
Updated