ZIP code · Washington · District of Columbia · United States

ZIP code 20451 — Washington

ZIP code 20451 serves Washington, District of Columbia.

Postal code: 20451
Single source Value from one source, not cross-checked.
City: Washington
County: District of Columbia
State: District of Columbia
Country: United States
Coordinates: 38.8977, -77.0444 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 8a (10 to 15 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone: America/New_York (UTC−5 / UTC−4 DST)
Area codes: 202, 771
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Tools: compare 20451 with another ZIP · ZIPs within 25 miles · distance from 20451

Nearby localities

20373Naval Anacost Annex
20374Washington Navy Yard
20388Washington Navy Yard
20391Washington Navy Yard
20398Washington Navy Yard
20376Washington Navy Yard

Climate — monthly normals

Warmest month Jul (avg high 90°F), coldest Jan (avg low 30°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	45	48	57	68	77	85	90	88	81	69	58	49
Avg low °F	30	32	39	48	58	68	72	71	64	52	42	35
Precip in	2.9	2.6	3.5	3.2	3.9	4.2	4.3	3.3	3.9	3.7	2.9	3.4

NOAA 1991–2020 climate normals from the nearest station: WASHINGTON REAGAN AP (3.5 mi) · NOAA NCEI

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page