ZIP code · Marshall · Washington · United States

ZIP code 99020 — Marshall

ZIP code 99020 serves Marshall, Washington.

Postal code: 99020
Single source Value from one source, not cross-checked.
City: Marshall
County: Spokane FIPS 53063
State: Washington
Country: United States
Coordinates: 47.5649, -117.4994 — precision precise (locality)
View on OpenStreetMap
Population: 15 (ZCTA, ACS 5-year)
Population density: 353 / sq mi
Land area: 0 sq mi (0.1 km²) (ZCTA, ACS 5-year)
Per-capita income: $0
Households: 7
Housing units: 7
Congressional district: WA-5 (119th Congress)
USDA hardiness zone: 6b (-5 to 0 °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 99020 with another ZIP · ZIPs within 25 miles · distance from 99020

Climate — monthly normals

Warmest month Jul (avg high 84°F), coldest Dec (avg low 24°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	35	40	49	57	67	74	84	84	74	58	42	34
Avg low °F	25	26	32	37	45	51	58	57	49	38	30	24
Precip in	2.0	1.4	1.8	1.3	1.6	1.2	0.4	0.5	0.6	1.4	2.1	2.3

NOAA 1991–2020 climate normals from the nearest station: SPOKANE INTL AP (4.2 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 · 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

Map of ZIP code 99020

Climate — monthly normals

About this page