Washington, DC Frost Dates
Washington, DC's average last spring frost is March 29 and its average first fall frost is November 8, from NOAA's 1991–2020 records.
Frost dates for Washington, DC
Dates are for 32°F at the NOAA station nearest the ZIP code at the center of DC. "Safer date" is when only 1 year in 10 still gets a frost, a good target for tomatoes and peppers.
| City | Average last frost | Safer date | Average first frost | Frost-free days |
|---|---|---|---|---|
| Washington | Mar 29 | Apr 11 | Nov 8 | 224 |
Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020. City centers from the US Census Bureau. Click a city for its nearest station and, where it has frost dates, hard-freeze dates and a vegetable planting calendar. See how we calculate.
Frequently asked questions
When is the last frost in Washington, DC?
The average last spring frost in Washington is March 29, and only 1 year in 10 has a frost after April 11. The average first fall frost is November 8. These come from NOAA's 1991–2020 records at the Natl Arboretum DC station.
When should I plant tomatoes in Washington, DC?
UNH Extension times tomato transplants for 1 to 2 weeks after the average last frost. In Washington that's about Apr 5 to Apr 12. Look up your ZIP code for your own dates and a full vegetable planting calendar.
More for Washington, DC: Washington, DC climate zones (insulation) · Washington, DC planting zones · Frost line depth by state