ZIP code · Hay · Washington · United States

ZIP code 99136 — Hay

ZIP code 99136 serves Hay, Washington.

Postal code: 99136
Single source Value from one source, not cross-checked.
City: Hay
County: Whitman FIPS 53075
State: Washington
Country: United States
Coordinates: 46.6973, -117.9417 — precision precise (locality)
View on OpenStreetMap
Population: 19 (ZCTA, ACS 5-year)
Population density: 1 / sq mi
Land area: 17.4 sq mi (45 km²) (ZCTA, ACS 5-year)
Per-capita income: $44,568
Median age: 60.9
Households: 13
Housing units: 21
Median home value: $118,800
Congressional district: 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 99136 with another ZIP · ZIPs within 25 miles · distance from 99136

Climate — monthly normals

Warmest month Jul (avg high 90°F), coldest Dec (avg low 25°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	39	45	54	62	72	79	90	89	79	63	47	38
Avg low °F	26	27	31	36	42	48	53	52	44	36	30	25
Precip in	2.0	1.3	1.7	1.3	1.3	1.0	0.3	0.3	0.5	1.1	2.0	2.4

NOAA 1991–2020 climate normals from the nearest station: LACROSSE (8.7 mi) · NOAA NCEI

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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 99136

Climate — monthly normals

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