ZIP code · Watertown · Massachusetts · United States

ZIP code 02471 — Watertown

ZIP code 02471 serves Watertown, Massachusetts.

Postal code: 02471
Single source Value from one source, not cross-checked.
City: Watertown
County: Middlesex
State: Massachusetts
Country: United States
Coordinates: 42.3709, -71.1828 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 6b (-5 to 0 °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: 617, 857
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 02471 with another ZIP · ZIPs within 25 miles · distance from 02471

Climate — monthly normals

Warmest month Jul (avg high 85°F), coldest Jan (avg low 19°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	37	40	47	59	69	79	85	83	76	64	53	42
Avg low °F	19	21	28	38	48	58	64	63	55	43	34	26
Precip in	3.9	3.6	4.5	4.3	3.6	4.2	3.5	3.7	4.0	5.0	4.0	5.1

NOAA 1991–2020 climate normals from the nearest station: JAMAICA PLAIN (5.5 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