Frost dates in Delaware
Across Delaware, the typical last spring frost is around Apr 7 and the first fall frost around Nov 4. Your own dates depend on where you are in the state; find your county below.
Most of the state's last spring frosts fall between Apr 2 and Apr 11, and its first fall frosts between Oct 30 and Nov 10.
These are the dates with a 50% chance of a 32°F frost on or after (spring) or on or before (fall), so plan tender crops a week or two after the spring date and keep row cover handy. For dates at your exact ZIP code, use the zone and frost date lookup; for what to plant when, see the planting guide by frost date.
Hardiness zones in Delaware: zone 7a, zone 7b, zone 8a
Frost dates by county in Delaware
| County | Last spring frost | First fall frost | Growing season |
|---|---|---|---|
| Kent | Apr 4 | Nov 4 | About 214 days |
| New Castle | Apr 7 | Nov 2 | About 209 days |
| Sussex | Apr 4 | Nov 6 | About 216 days |
Source: NOAA NCEI U.S. Climate Normals 1991–2020, 50% probability of 32°F, from the weather station nearest each ZIP code; each county shows the middle value across its ZIP codes. Hills, valleys and cities can run a week or more earlier or later.