ZIP code · Oshkosh · Wisconsin · United States
ZIP code 54903 — Oshkosh
ZIP code 54903 serves Oshkosh, Wisconsin.
- Postal code
- 54903Single source Value from one source, not cross-checked.
- City
- Oshkosh
- County
- Winnebago
- State
- Wisconsin
- Country
- United States
- Coordinates
- 44.0686, -88.6449 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 5b (-15 to -10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 920Telephone 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 54903 with another ZIP · ZIPs within 25 miles · distance from 54903
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 10°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 26 | 30 | 41 | 54 | 67 | 77 | 82 | 80 | 73 | 59 | 44 | 32 |
| Avg low °F | 10 | 13 | 24 | 36 | 48 | 59 | 63 | 61 | 53 | 41 | 29 | 18 |
| Precip in | 1.3 | 1.1 | 1.9 | 3.2 | 3.9 | 4.8 | 3.8 | 3.4 | 3.3 | 2.9 | 2.0 | 1.6 |
NOAA 1991–2020 climate normals from the nearest station: OSHKOSH (5.5 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