ZIP code · Mount Sterling · Wisconsin · United States
ZIP code 54645 — Mount Sterling
ZIP code 54645 serves Mount Sterling, Wisconsin.
- Postal code
- 54645Single source Value from one source, not cross-checked.
- City
- Mount Sterling
- County
- Crawford FIPS 55023
- State
- Wisconsin
- Country
- United States
- Coordinates
- 43.3153, -90.9287 — precision precise (locality)
View on OpenStreetMap - Population
- 114 (ZCTA, ACS 5-year)
- Population density
- 164 / sq mi
- Land area
- 0.7 sq mi (1.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $48,472
- Per-capita income
- $20,152
- Median age
- 42.3
- Households
- 51
- Housing units
- 64
- Median home value
- $130,000
- Median gross rent
- $683 / month
- Congressional district
- WI-3 (119th Congress)
- 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
- 608 (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 54645 with another ZIP · ZIPs within 25 miles · distance from 54645
Map of ZIP code 54645
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 7°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 27 | 32 | 45 | 58 | 70 | 80 | 83 | 82 | 74 | 61 | 45 | 33 |
| Avg low °F | 7 | 11 | 23 | 35 | 46 | 57 | 61 | 59 | 50 | 37 | 26 | 15 |
| Precip in | 1.3 | 1.2 | 2.0 | 3.9 | 4.2 | 5.6 | 4.8 | 4.4 | 3.9 | 2.7 | 2.1 | 1.6 |
NOAA 1991–2020 climate normals from the nearest station: GAYS MILLS (4.0 mi) · NOAA NCEI
Places in ZIP 54645
- 1 parks
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