ZIP code · Custer · Washington · United States
ZIP code 98240 — Custer
ZIP code 98240 serves Custer, Washington.
- Postal code
- 98240Single source Value from one source, not cross-checked.
- City
- Custer
- County
- Whatcom FIPS 53073
- State
- Washington
- Country
- United States
- Coordinates
- 48.9374, -122.6226 — precision precise (locality)
View on OpenStreetMap - Population
- 3,208 (ZCTA, ACS 5-year)
- Population density
- 144 / sq mi
- Land area
- 22.3 sq mi (57.7 km²) (ZCTA, ACS 5-year)
- Median household income
- $106,256
- Per-capita income
- $49,139
- Median age
- 37
- Households
- 1,145
- Housing units
- 1,200
- Median home value
- $566,400
- Congressional district
- WA-2 (119th Congress)
- USDA hardiness zone
- 8b (15 to 20 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
Tools: compare 98240 with another ZIP · ZIPs within 25 miles · distance from 98240
Map of ZIP code 98240
Climate — monthly normals
Warmest month Jul (avg high 73°F), coldest Jan (avg low 34°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 45 | 48 | 52 | 58 | 64 | 69 | 73 | 73 | 67 | 57 | 50 | 44 |
| Avg low °F | 34 | 35 | 38 | 42 | 47 | 52 | 55 | 55 | 50 | 44 | 38 | 34 |
| Precip in | 6.2 | 3.4 | 4.2 | 3.0 | 2.6 | 1.9 | 1.1 | 1.1 | 2.2 | 4.4 | 6.1 | 5.6 |
NOAA 1991–2020 climate normals from the nearest station: BLAINE (8.2 mi) · NOAA NCEI
Places in ZIP 98240
- 1 schools
- 1 supermarkets
- 1 restaurants & cafés
- 2 bars & pubs
- 1 parks
- 1 gyms & sports centres
- 1 post offices
- 3 places of worship
- 2 gas stations
- 2 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