ZIP code · Grand Coulee · Washington · United States
ZIP code 99133 — Grand Coulee
ZIP code 99133 serves Grand Coulee, Washington.
- Postal code
- 99133Single source Value from one source, not cross-checked.
- City
- Grand Coulee
- County
- Grant FIPS 53025
- State
- Washington
- Country
- United States
- Coordinates
- 47.9385, -118.9978 — precision precise (locality)
View on OpenStreetMap - Population
- 1,341 (ZCTA, ACS 5-year)
- Population density
- 7 / sq mi
- Land area
- 182.5 sq mi (472.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $49,625
- Per-capita income
- $36,287
- Median age
- 50.2
- Households
- 671
- Housing units
- 847
- Median home value
- $221,100
- Median gross rent
- $703 / month
- Congressional districts
- WA-4 (also WA-5) (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °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)
- Area code
- 509 (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 99133 with another ZIP · ZIPs within 25 miles · distance from 99133
Map of ZIP code 99133
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 23°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 33 | 40 | 51 | 61 | 71 | 78 | 88 | 87 | 77 | 60 | 43 | 33 |
| Avg low °F | 23 | 25 | 32 | 38 | 46 | 52 | 59 | 58 | 51 | 40 | 31 | 24 |
| Precip in | 1.1 | 0.9 | 1.1 | 1.0 | 1.1 | 1.1 | 0.5 | 0.3 | 0.4 | 0.9 | 1.2 | 1.4 |
NOAA 1991–2020 climate normals from the nearest station: COULEE DAM 1 SW (1.1 mi) · NOAA NCEI
Places in ZIP 99133
- 1 schools
- 1 hospitals & clinics
- 1 supermarkets
- 3 restaurants & cafés
- 4 parks
- 1 libraries
- 1 post offices
- 4 places of worship
- 1 banks
- 4 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