ZIP code · Baltimore · Maryland · United States

ZIP code 21273 — Baltimore

ZIP code 21273 serves Baltimore, Maryland.

Postal code: 21273
Single source Value from one source, not cross-checked.
City: Baltimore
County: Baltimore (city)
State: Maryland
Country: United States
Coordinates: 39.2847, -76.6205 — 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: 410, 443, 667, 301
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 21273 with another ZIP · ZIPs within 25 miles · distance from 21273

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	44	47	55	67	76	85	90	87	80	69	58	48
Avg low °F	30	32	39	48	58	68	73	71	65	53	43	35
Precip in	3.1	2.8	3.9	3.5	3.4	3.4	4.7	4.3	4.5	3.5	3.0	3.7

NOAA 1991–2020 climate normals from the nearest station: MD SCI CTR BALTIMORE (0.7 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