ZIP code · Oldwick · New Jersey · United States
ZIP code 08858 — Oldwick
ZIP code 08858 serves Oldwick, New Jersey.
- Postal code
- 08858Single source Value from one source, not cross-checked.
- City
- Oldwick
- County
- Hunterdon FIPS 34019
- State
- New Jersey
- Country
- United States
- Coordinates
- 40.6726, -74.7474 — precision precise (locality)
View on OpenStreetMap - Population
- 0 (ZCTA, ACS 5-year)
- Population density
- 0 / sq mi
- Land area
- 2.6 sq mi (6.8 km²) (ZCTA, ACS 5-year)
- Households
- 0
- Housing units
- 0
- Congressional district
- NJ-7 (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °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 code
- 908Telephone 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 08858 with another ZIP · ZIPs within 25 miles · distance from 08858
Map of ZIP code 08858
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 21°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 43 | 51 | 63 | 73 | 81 | 86 | 84 | 78 | 66 | 55 | 44 |
| Avg low °F | 21 | 22 | 30 | 39 | 48 | 58 | 63 | 61 | 54 | 42 | 33 | 26 |
| Precip in | 3.2 | 2.2 | 3.9 | 3.6 | 3.5 | 4.2 | 4.9 | 5.2 | 3.8 | 3.7 | 3.4 | 3.9 |
NOAA 1991–2020 climate normals from the nearest station: SOMERVILLE SOMERSET AP (5.3 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 · 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