Frost dates in District of Columbia
Across District of Columbia, the typical last spring frost is around Mar 24 and the first fall frost around Nov 18. 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 Mar 24 and Apr 9, and its first fall frosts between Oct 31 and Nov 18.
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 District of Columbia: zone 7a, zone 7b, zone 8a
Frost dates by county in District of Columbia
| County | Last spring frost | First fall frost | Growing season |
|---|---|---|---|
| District of Columbia | Mar 24 | Nov 18 | About 239 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.