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Weather & Climate in Farmington, WA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Farmington experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 31°F in January while summers reach 68°F in July. The area gets 273 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 18.4 inches (drier than the 38-inch national average). The area receives 26.2 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 28 / among the cleanest air in the country. The city sits at an elevation of 2,633 feet.

Temperature

31°F Jan (-1°C) 68°F Jul (20°C)
Annual Average48.1°F
11% below US avg
January Average31°F (-1°C)
July Average68°F (20°C)
Sunny Days273 days/yr

Geography

Elevation2,633 ft (803 m)
Area0.1 sq mi (0.4 km²)
Population Density378/sq mi
Coordinates47.0887°N, 117.0464°W
TimezoneAmerica/Los_Angeles
CountySpokane County County
Nearest AirportPullman/Moscow Regional (PUW)
24 miles away

Precipitation & Snow

Annual Rainfall 18.4"
52% below US avg
Snowfall 26.2"
Wettest Month (Dec) 3.07"
Driest Month (Jul) 0.87"

Air Quality

AQI Median28.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score90.0 / 100
Social Vulnerability21.0 / 100
Community Resilience75.8 / 100

Hazard Breakdown

Tornado Relatively Low
Earthquake Relatively Low
Wildfire Relatively Moderate
Flood Relatively Moderate
Hail Relatively Low
Strong Wind Relatively High
Heat Wave Relatively Moderate
Winter Weather Relatively High
Lightning Relatively Moderate
Ice Storm Very High
Drought Very Low
Cold Wave Relatively High
Landslide Very Low
Avalanche Relatively Moderate
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

90 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.

Aug 17, 1994 1 km E of Mullan, Idaho M4.1 105 km 2 km
Nov 11, 2001 3 km NE of Spokane, Washington M4.0 72 km 4 km
Jun 25, 2001 Washington M3.9 71 km 10 km
Apr 24, 2015 8 km WSW of Hope, Idaho M3.9 134 km 17 km
Jun 28, 1998 3 km SE of Genesee, Idaho M3.8 63 km 10 km
Apr 24, 2015 12 km SSW of East Hope, Idaho M3.7 127 km 9 km
May 30, 1996 3 km SSW of Mullan, Idaho M3.6 100 km 1 km
Mar 14, 1997 1 km E of Mullan, Idaho M3.6 105 km 2 km
Jan 20, 2000 21 km ENE of Athol, Idaho M3.5 112 km 5 km
Mar 8, 1994 32 km S of Wallace, Idaho M3.4 85 km 5 km
Jan 13, 1994 11 km SW of Lind, Washington M3.4 127 km 0 km
Jun 25, 2001 2 km SSE of Town and Country, Washington M3.4 74 km 10 km
Jun 17, 2004 11 km SSE of Washtucna, Washington M3.4 102 km 17 km
Nov 2, 1996 4 km W of Trout Creek, Montana M3.4 134 km 5 km
Jun 28, 1997 3 km NNW of Mullan, Idaho M3.4 104 km 2 km
May 10, 2000 Idaho-Montana border region M3.3 105 km 2 km
Feb 11, 2025 2 km NNW of Mullan, Idaho M3.3 104 km 5 km
Apr 24, 2015 7 km SW of Hope, Idaho M3.3 133 km 10 km
Sep 22, 2003 12 km NW of Rathdrum, Idaho M3.3 90 km 13 km
Nov 12, 2001 3 km NNE of Spokane, Washington M3.3 72 km 0 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

30 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 injuries.

Date Rating Distance Path Fatalities
May 31, 1997 EF2 94 km 5.0 mi 0
Aug 30, 1971 EF2 30 km 0.5 mi 0
Mar 14, 1966 EF2 87 km 1.0 mi 0
May 8, 1962 EF2 79 km 9.1 mi 0
May 6, 1957 EF2 45 km 1.5 mi 0
Jun 15, 1954 EF2 46 km 0.5 mi 0
May 31, 1997 EF1 92 km 5.0 mi 0
May 19, 1986 EF1 44 km 2.0 mi 0
Apr 12, 1984 EF1 72 km 1.0 mi 0
Oct 17, 1983 EF1 58 km 0.5 mi 0
May 2, 1973 EF1 40 km 0.1 mi 0
Jun 29, 1970 EF1 93 km 0.1 mi 0
Jun 20, 1969 EF1 68 km 1.0 mi 0
Apr 18, 2024 EF0 74 km 0.0 mi 0
May 6, 2022 EF0 66 km 2.1 mi 0
May 6, 2022 EF0 73 km 0.6 mi 0
Aug 9, 2016 EF0 76 km 0.2 mi 0
Jul 22, 2016 EF0 75 km 0.2 mi 0
Oct 5, 2011 EF0 57 km 0.0 mi 0
May 21, 2004 EF0 76 km 0.2 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

3 tsunamis recorded within 500 km. Highest wave on record: 19.8 m (65 ft).

Year Location Cause Max Wave Deaths Distance
1949 COLUMBIA RIVER VALLEY, WA Meteorological 19.8 m — 128 km
2009 COLUMBIA RIVER VALLEY, WA Meteorological 9.0 m — 109 km
2009 COLUMBIA RIVER VALLEY, WA Meteorological 3.6 m — 123 km
Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: SCHOOL (51,701 acres, 2005).

Year Name Acres Burned Distance
2005 SCHOOL 51,701 99 km
2015 FISHER 20,757 98 km
1991 UNNAMED 12,401 96 km
2021 BEDROCK 11,998 72 km
2010 HUBBARD 10,824 97 km
2016 SNAKE RIVER FIRE 10,349 59 km
2023 GRAY 10,096 68 km
2014 WATERMELON HILL 9,321 63 km
2021 SILCOTT 8,864 82 km
2007 UNNAMED 8,547 92 km
2022 WAGNER ROAD 8,155 64 km
2016 SPOKANE COMPLEX 6,839 48 km
1997 POW WAH KEE 6,418 83 km
2022 RIPARIA 5,631 79 km
2016 PALOUSE FALLS 5,305 98 km
2015 NORTH GRIZZLY 5,286 99 km
2023 RIDGE CREEK 4,608 92 km
2021 BENTON RIDGE 4,400 98 km
1992 TUCANNON 3,693 92 km
1996 UNNAMED 3,523 82 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 31°F (-1°C) 2.8 in
February 34°F (1°C) 2.2 in
March 39°F (4°C) 2.2 in
April 45°F (7°C) 1.8 in
May 53°F (12°C) 2.0 in
June 59°F (15°C) 1.6 in
July 68°F (20°C) 0.9 in Warmest, Driest
August 66°F (19°C) 1.0 in
September 58°F (14°C) 1.1 in
October 47°F (8°C) 1.5 in
November 36°F (2°C) 2.8 in
December 29°F (-2°C) 3.1 in Coldest, Wettest

Farmington has a seasonal temperature swing of 39°F / from 29°F in December to 68°F in July. Total annual precipitation is 23.0 inches, with December being the wettest month (3.1") and July the driest (0.9").

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