ZIP code · Fairfax · California · United States
ZIP code 94978 — Fairfax
ZIP code 94978 serves Fairfax, California.
- Postal code
- 94978Single source Value from one source, not cross-checked.
- City
- Fairfax
- County
- Marin
- State
- California
- Country
- United States
- Coordinates
- 37.9871, -122.5889 — 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 code
- 559 (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 94978 with another ZIP · ZIPs within 25 miles · distance from 94978
Climate — monthly normals
Warmest month Aug (avg high 81°F), coldest Dec (avg low 42°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 57 | 61 | 65 | 68 | 72 | 78 | 81 | 81 | 81 | 75 | 65 | 57 |
| Avg low °F | 43 | 44 | 46 | 48 | 51 | 54 | 55 | 56 | 54 | 51 | 46 | 42 |
| Precip in | 7.1 | 6.9 | 4.4 | 2.0 | 0.9 | 0.1 | 0.0 | 0.1 | 0.1 | 1.5 | 3.5 | 7.8 |
NOAA 1991–2020 climate normals from the nearest station: SAN RAFAEL CIVIC CTR (2.9 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