ZIP code · Rehobeth · Maryland · United States

ZIP code 21857 — Rehobeth

ZIP code 21857 serves Rehobeth, Maryland.

Postal code: 21857
Single source Value from one source, not cross-checked.
City: Rehobeth
County: Somerset
State: Maryland
Country: United States
Coordinates: 38.0390, -75.6630 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 7b (5 to 10 °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, 667 (from the nearest rate centre)
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 21857 with another ZIP · ZIPs within 25 miles · distance from 21857

Climate — monthly normals

Warmest month Jul (avg high 86°F), coldest Jan (avg low 30°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	46	49	55	64	73	81	86	84	79	69	59	51
Avg low °F	30	31	37	46	56	65	70	69	63	51	41	34
Precip in	3.1	2.8	3.9	3.1	3.2	3.4	4.4	4.3	4.3	4.0	2.9	3.8

NOAA 1991–2020 climate normals from the nearest station: WALLOPS ISLAND FLIGHT FAC (12.9 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