ZIP code · Petrolia · California · United States
ZIP code 95558 — Petrolia
ZIP code 95558 serves Petrolia, California.
- Postal code
- 95558Single source Value from one source, not cross-checked.
- City
- Petrolia
- County
- Humboldt FIPS 06023
- State
- California
- Country
- United States
- Coordinates
- 40.2868, -124.2271 — precision precise (locality)
View on OpenStreetMap - Population
- 244 (ZCTA, ACS 5-year)
- Population density
- 1 / sq mi
- Land area
- 168.4 sq mi (436.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $51,250
- Per-capita income
- $31,394
- Median age
- 62.6
- Households
- 132
- Housing units
- 193
- Congressional district
- CA-2 (119th Congress)
- 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
- 707Telephone 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 95558 with another ZIP · ZIPs within 25 miles · distance from 95558
Map of ZIP code 95558
Climate — monthly normals
Warmest month Sep (avg high 73°F), coldest Dec (avg low 42°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 57 | 58 | 59 | 62 | 64 | 67 | 70 | 72 | 73 | 69 | 61 | 55 |
| Avg low °F | 43 | 43 | 44 | 45 | 49 | 51 | 54 | 54 | 52 | 48 | 45 | 42 |
| Precip in | 8.6 | 7.8 | 6.9 | 3.9 | 1.9 | 0.6 | 0.1 | 0.1 | 0.5 | 2.4 | 5.2 | 9.7 |
NOAA 1991–2020 climate normals from the nearest station: SCOTIA (15.0 mi) · NOAA NCEI
Places in ZIP 95558
- 2 schools
- 4 parks
- 2 playgrounds
- 1 post offices
- 2 places of worship
- 1 gas stations
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
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 · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page