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Weather & Climate in Asotin, WA

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

Asotin experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 36°F in January while summers reach 76°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 12.9 inches (drier than the 38-inch national average). The area receives 12.7 inches of snow annually. Air quality is rated Good with a median AQI of 42. 62% of days have good air quality. The city sits at an elevation of 1,202 feet.

Temperature

36°F Jan (2°C) 76°F Jul (24°C)
Annual Average53.8°F
0% below US avg
January Average36°F (2°C)
July Average76°F (24°C)
Sunny Days273 days/yr

Geography

Elevation1,202 ft (366 m)
Area1.1 sq mi (2.8 km²)
Population Density971/sq mi
Coordinates46.3337°N, 117.0398°W
TimezoneAmerica/Los_Angeles
CountyAsotin County County
Nearest AirportPullman/Moscow Regional (PUW)
28 miles away

Precipitation & Snow

Annual Rainfall 12.9"
66% below US avg
Snowfall 12.7"
Wettest Month (Nov) 1.77"
Driest Month (Jul) 0.83"

Air Quality

AQI Median42.0
RatingGood
Good Days %62.1%
Unhealthy Days6

Natural Hazard Risk

Overall RiskVery Low
Risk Score17.9 / 100
Social Vulnerability66.4 / 100
Community Resilience20.0 / 100

Hazard Breakdown

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

Earthquake History

78 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.

Nov 28, 1991 7 km S of Walla Walla East, Washington M4.3 106 km 9 km
Jul 14, 1992 6 km S of Walla Walla East, Washington M4.1 105 km 11 km
Jun 28, 1998 3 km SE of Genesee, Idaho M3.8 25 km 10 km
Nov 8, 1997 39 km SE of Pierce, Idaho M3.8 125 km 5 km
Jan 23, 2015 3 km N of Cayuse, Oregon M3.5 136 km 20 km
Dec 24, 1999 18 km WNW of New Meadows, Idaho M3.5 148 km 3 km
Jun 17, 2004 11 km SSE of Washtucna, Washington M3.4 99 km 17 km
Jan 13, 1994 11 km SW of Lind, Washington M3.4 141 km 0 km
Mar 8, 1994 32 km S of Wallace, Idaho M3.4 127 km 5 km
Dec 15, 1991 6 km SSW of Walla Walla East, Washington M3.3 106 km 8 km
Feb 10, 2013 29 km ESE of Pierce, Idaho M3.2 121 km 5 km
Jan 26, 1992 28 km ENE of Halfway, Oregon M3.2 147 km 5 km
Apr 10, 2012 3 km WNW of Touchet, Washington M3.2 133 km 14 km
Aug 14, 2017 19 km NNW of Halfway, Oregon M3.1 144 km 8 km
Mar 12, 1999 17 km NW of Malden, Washington M3.1 120 km 5 km
Mar 18, 1993 3 km SSW of Osburn, Idaho M3.1 149 km 10 km
May 23, 1999 19 km NE of Halfway, Oregon M3.0 149 km 5 km
Nov 6, 2002 21 km SE of Joseph, Oregon M3.0 122 km 5 km
Mar 3, 1999 11 km ESE of Joseph, Oregon M3.0 112 km 18 km
Sep 6, 2000 2 km NW of Walla Walla, Washington M3.0 106 km 0 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

19 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.

Date Rating Distance Path Fatalities
Aug 30, 1971 EF2 69 km 0.5 mi 0
Jun 11, 1968 EF2 60 km 9.6 mi 0
Mar 14, 1966 EF2 61 km 1.0 mi 0
May 8, 1962 EF2 20 km 9.1 mi 0
Jan 16, 2000 EF1 74 km 1.0 mi 0
May 19, 1986 EF1 51 km 2.0 mi 0
May 2, 1973 EF1 44 km 0.1 mi 0
Jun 20, 1969 EF1 26 km 1.0 mi 0
Jul 12, 2016 EF0 92 km 1.0 mi 0
May 9, 2013 EF0 94 km 0.1 mi 0
Oct 7, 2010 EF0 53 km 1.0 mi 0
Oct 7, 2010 EF0 55 km 0.4 mi 0
May 6, 2009 EF0 92 km 0.2 mi 0
Jun 29, 2007 EF0 86 km 0.3 mi 0
May 31, 1997 EF0 11 km 0.1 mi 0
Jun 1, 1991 EF0 24 km 0.1 mi 0
May 1, 1991 EF0 26 km 0.1 mi 0
Sep 14, 1986 EF0 83 km 0.2 mi 0
Apr 11, 1979 EF0 84 km 1.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: DOUBLE CREEK (171,012 acres, 2022).

Year Name Acres Burned Distance
2022 DOUBLE CREEK 171,012 96 km
2000 MALONEY CREEK 131,397 47 km
2006 COLUMBIA COMPLEX 118,865 62 km
2021 SHOVEL CREEK 109,829 38 km
2021 LICK CREEK 80,376 32 km
2015 BUTTE CREEK 79,418 57 km
2012 CACHE CREEK 75,521 49 km
2014 BIG COUGAR 65,397 40 km
2007 POE CABIN 59,704 91 km
1988 TEEPEE BUTTE 59,565 54 km
2005 SCHOOL 51,701 45 km
2007 CHIMNEY COMPLEX 50,646 34 km
1996 SALT COMPLEX (SALT CREEK) 50,250 94 km
2015 KAMIAH GULCH 48,459 77 km
2017 POWERLINE 45,449 45 km
2021 GREEN RIDGE 44,604 50 km
1986 JOSEPH/STARVATION 37,064 57 km
2014 SOMERS 36,374 91 km
2000 EASTSIDE COMPLEX (DEEP CREEK) 31,969 73 km
2000 BURNT FLATS 24,808 91 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 36°F (2°C) 1.7 in
February 38°F (3°C) 1.3 in
March 44°F (7°C) 1.5 in
April 50°F (10°C) 1.5 in
May 57°F (14°C) 1.7 in
June 65°F (18°C) 1.3 in
July 76°F (24°C) 0.8 in Warmest, Driest
August 71°F (22°C) 0.8 in
September 62°F (16°C) 0.9 in
October 50°F (10°C) 1.2 in
November 40°F (5°C) 1.8 in Wettest
December 33°F (1°C) 1.6 in Coldest

Asotin has a seasonal temperature swing of 42°F / from 33°F in December to 76°F in July. Total annual precipitation is 16.2 inches, with November being the wettest month (1.8") and July the driest (0.8").

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