Daylight through the yearLongest day (Jun 21): 15 h 52 min5:04 am – 8:56 pmShortest day (Dec 21): 8 h 33 min7:40 am – 4:13 pm
Sun todaySunrise –Sunset –
People8,143 residentsin the ZIP code areaMedian age 29.42,388 householdsMedian household income $61,333Median home value $427,800Median rent $1,243 a month54% of homes owner-occupiedMedian property tax $2,576 a yearSource: US Census Bureau, American Community Survey 2020-2024
Work and commuting7.6% unemployment rate66% of adults are in the labour force, 3,626 employedMain industries: farming, forestry and mining 64%, education and health care 19%, transport, warehousing and utilities 4%Average commute 22 minutes57% drive alone, 30% car-pool, 2% take public transport, 2% walk or cycle, 8% work from homeSource: US Census Bureau, American Community Survey 2020-2024, ZIP area
Education and languages12% of adults have a bachelor's degree or higher54% finished high school, 1% hold a graduate degreeLanguages at home: English only 20%, Spanish 80%42% speak English less than very wellSource: US Census Bureau, American Community Survey 2020-2024, ZIP area
ClimateWarmest month July: highs 93°F, lows 59°FColdest month December: highs 40°F, lows 26°F7 in of rain a year, on about 25 dayswettest month December10 in of snow a year, on about 7 days54 days above 90°F, 122 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Smyrna station, 8 mi away; rain from Priest Rapids Dam; snow from Moxee City 10 E
Parks and public landsLower Crab Creekstate conservation land · 5.2 mi · 24,723 acresPriest Rapidsstate conservation land · 9.7 mi · 2,286 acresColumbia National Wildlife Refugenational wildlife refuge · 14.0 mi · 26,984 acresPotholesstate park · 23.6 mi · 771 acresColockum Game Rangenational conservation area · 36.0 mi · 4,927 acresSunnyside Waterfowl Management Areanational conservation area · 37.5 mi · 322 acresSource: USGS Protected Areas Database (PAD-US)
Earthquakes74 of magnitude 3 or more within 50 miles since 19703 of magnitude 4+, 0 of magnitude 5+Largest: magnitude 4.4 on 20 Dec 197319 mi away, near Othello, WashingtonMost recent: magnitude 3.1 on 11 Aug 202649 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Relatively LowGrant County, WA, compared with all US countiesHigher-risk hazardsCold wave Relatively HighSource: FEMA National Risk Index (county level)
Air quality80% of days had good air in 2025291 of 365 days measured71 moderate, 2 unhealthy for sensitive groups, 1 unhealthy daysMedian index 28, worst day 154main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, Grant County monitors, WA
Internet at home94% of households have a broadband subscription65% have cable, fibre or DSL22% rely on a mobile data plan alone4% have no internet at homeSource: US Census Bureau, American Community Survey 2020-2024
Drinking waterCity of Mattawaserves 5,370 people from ground water1 health-based violation since 2021latest Jun 2024: coliform bacteria, maximum contaminant level1 monitoring or reporting violation since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation710 ft216 m above sea levelSource: USGS 3D Elevation Program
Local servicesTown hallMattawa City Hall9.5 miPoliceMattawa Police Department9.5 miFire stationGrant County Fire District 8 Station 83under a mileSource: USGS National Structures Dataset
Getting aroundAirportYakima Air Terminal McAllister Field YKM42 miMajor airportSpokane International Airport GEG119 miInterstateI-9019 miUS highwayUS 9731 miAmtrakEphrata, WA EPH41 miCoachConnelWheat Line9.2 miSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 99349 ZIP area.
