ZIP code · Hayward · California · United States

ZIP code 94557 — Hayward

ZIP code 94557 serves Hayward, California.

Postal code: 94557
Single source Value from one source, not cross-checked.
City: Hayward
County: Alameda
State: California
Country: United States
Coordinates: 37.6802, -121.9215 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 10a (30 to 35 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone: America/Los_Angeles (UTC−8 / UTC−7 DST)
Area codes: 510, 341
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 94557 with another ZIP · ZIPs within 25 miles · distance from 94557

Climate — monthly normals

Warmest month Jul (avg high 89°F), coldest Dec (avg low 39°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	57	61	66	71	77	84	89	89	86	77	65	57
Avg low °F	39	41	43	46	50	54	57	57	55	50	43	39
Precip in	2.8	2.7	2.2	1.1	0.5	0.1	0.0	0.0	0.1	0.8	1.5	2.7

NOAA 1991–2020 climate normals from the nearest station: LIVERMORE (5.9 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