When is the last frost in District of Columbia?

It varies by location. Across District of Columbia, average last spring frost dates range from March 24 (Naval Anacost Annex) to March 29 (Washington). Look up your ZIP code for your local date.

Why do nearby towns have different frost dates?

Elevation, distance from large bodies of water, and whether a weather station sits in a valley, on a hill, or in a city all change how cold nights get. Each ZIP code is matched to the most representative nearby NOAA station.

District of Columbia frost dates

Average last spring and first fall frost (32°F) dates for 3 cities and towns in District of Columbia, from NOAA 1991-2020 climate normals. Average last frost dates range from March 24 in Naval Anacost Annex to March 29 in Washington. Open a ZIP code for frost risk by date and a planting calendar.

Cities with several ZIP codes use the first-listed ZIP. Open a ZIP for exact local dates.
City	Avg last frost	Avg first frost	Season	ZIP codes
Naval Anacost Annex	Mar 24	Nov 18	241 days	20373
Washington	Mar 29	Nov 8	224 days	20001, 20002, 20003, 20004 +267 more
Washington Navy Yard	Mar 24	Nov 18	241 days	20374, 20376, 20388, 20391 +1 more

Frequently asked questions

When is the last frost in District of Columbia?: It varies by location. Across District of Columbia, average last spring frost dates range from March 24 (Naval Anacost Annex) to March 29 (Washington). Look up your ZIP code for your local date.
Why do nearby towns have different frost dates?: Elevation, distance from large bodies of water, and whether a weather station sits in a valley, on a hill, or in a city all change how cold nights get. Each ZIP code is matched to the most representative nearby NOAA station.