ZIP code · Westby · Montana · United States
ZIP code 59275 — Westby
ZIP code 59275 serves Westby, Montana.
- Postal code
- 59275Single source Value from one source, not cross-checked.
- City
- Westby
- County
- Sheridan FIPS 30091
- State
- Montana
- Country
- United States
- Coordinates
- 48.8587, -104.1247 — precision precise (locality)
View on OpenStreetMap - Population
- 567 (ZCTA, ACS 5-year)
- Population density
- 2 / sq mi
- Land area
- 376.3 sq mi (974.7 km²) (ZCTA, ACS 5-year)
- Median household income
- $68,594
- Per-capita income
- $38,608
- Median age
- 50
- Households
- 198
- Housing units
- 280
- Median home value
- $80,400
- Median gross rent
- $583 / month
- Congressional district
- MT-2 (119th Congress)
- USDA hardiness zone
- 3b (-35 to -30 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Denver (UTC−7 / UTC−6 DST)
- Area code
- 406Telephone 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 59275 with another ZIP · ZIPs within 25 miles · distance from 59275
Map of ZIP code 59275
Climate — monthly normals
Warmest month Aug (avg high 80°F), coldest Jan (avg low -2°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 20 | 24 | 36 | 53 | 65 | 73 | 80 | 80 | 70 | 54 | 36 | 24 |
| Avg low °F | -2 | 2 | 14 | 27 | 40 | 50 | 55 | 52 | 41 | 29 | 15 | 4 |
| Precip in | 0.4 | 0.3 | 0.6 | 1.0 | 2.2 | 3.1 | 2.5 | 1.6 | 1.3 | 1.0 | 0.5 | 0.5 |
NOAA 1991–2020 climate normals from the nearest station: WESTBY (3.5 mi) · NOAA NCEI
Places in ZIP 59275
- 1 schools
- 3 parks
- 2 playgrounds
- 1 post offices
- 3 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