Wilmington, DE Frost Dates
The last spring frost in Wilmington usually comes around April 7 and the first fall frost around November 1.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | April 7 | November 1 |
| Hard freeze, 28°F | March 27 | November 14 |
Growing season: about 209 days.
Frequently asked questions
When is the last frost in Wilmington, DE?
The median date of the last spring frost (32°F) is April 7. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past April 7 lowers the risk for tender plants.
When is the first frost in Wilmington?
The median date of the first fall frost (32°F) is November 1, and a hard freeze (28°F) usually follows around November 14.
How long is the growing season in Wilmington?
About 209 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USW00013781. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.