ZIP code · Napa · California · United States

ZIP code 94581 — Napa

ZIP code 94581 serves Napa, California.

Postal code: 94581
Single source Value from one source, not cross-checked.
City: Napa
County: Napa
State: California
Country: United States
Coordinates: 38.2971, -122.2855 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 9b (25 to 30 °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: 707, 369
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 94581 with another ZIP · ZIPs within 25 miles · distance from 94581

Climate — monthly normals

Warmest month Sep (avg high 84°F), coldest Dec (avg low 40°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	59	63	68	72	77	82	83	84	84	78	66	59
Avg low °F	40	42	44	46	50	54	56	56	53	49	44	40
Precip in	5.0	5.1	3.7	1.7	1.1	0.3	0.0	0.1	0.1	1.3	2.8	5.5

NOAA 1991–2020 climate normals from the nearest station: NAPA STATE HOSPITAL (1.7 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