ZIP code · Sioux City · Iowa · United States
ZIP code 51102 — Sioux City
ZIP code 51102 serves Sioux City, Iowa.
- Postal code
- 51102Single source Value from one source, not cross-checked.
- City
- Sioux City
- County
- Woodbury
- State
- Iowa
- Country
- United States
- Coordinates
- 42.3684, -96.3180 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 5a (-20 to -15 °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
- 712Telephone 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 51102 with another ZIP · ZIPs within 25 miles · distance from 51102
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 10°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 34 | 48 | 61 | 72 | 82 | 85 | 83 | 77 | 63 | 47 | 33 |
| Avg low °F | 10 | 15 | 26 | 37 | 49 | 59 | 63 | 61 | 51 | 38 | 25 | 15 |
| Precip in | 0.7 | 0.9 | 1.8 | 3.1 | 3.9 | 4.3 | 3.4 | 3.9 | 2.8 | 2.2 | 1.3 | 1.0 |
NOAA 1991–2020 climate normals from the nearest station: SIOUX CITY GATEWAY AP (3.5 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