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Weather & Climate in Deer Park, WA

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

Deer Park experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 28°F in January while summers reach 66°F in July. The area gets 276 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 22.5 inches (drier than the 38-inch national average). 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 2,202 feet.

Temperature

28°F Jan (-3°C) 66°F Jul (19°C)
Annual Average45.6°F
16% below US avg
January Average28°F (-3°C)
July Average66°F (19°C)
Sunny Days276 days/yr

Geography

Elevation2,202 ft (671 m)
Area2.7 sq mi (6.9 km²)
Population Density668/sq mi
Coordinates47.9642°N, 117.4398°W
TimezoneAmerica/Los_Angeles
CountySpokane County County
Nearest AirportSpokane International (GEG)
24 miles away

Precipitation & Snow

Annual Rainfall 22.5"
41% below US avg
Wettest Month (Dec) 2.87"
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

92 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.

Sep 1, 2015 15 km N of Nespelem Community, Washington M4.2 123 km 9 km
Aug 17, 1994 1 km E of Mullan, Idaho M4.1 136 km 2 km
Nov 11, 2001 3 km NE of Spokane, Washington M4.0 31 km 4 km
Jun 25, 2001 Washington M3.9 32 km 10 km
Apr 24, 2015 8 km WSW of Hope, Idaho M3.9 82 km 17 km
Mar 3, 1998 16 km NNE of Grand Forks, Canada M3.8 150 km 5 km
Apr 24, 2015 12 km SSW of East Hope, Idaho M3.7 82 km 9 km
Mar 14, 1997 1 km E of Mullan, Idaho M3.6 136 km 2 km
May 30, 1996 3 km SSW of Mullan, Idaho M3.6 135 km 1 km
Jan 20, 2000 21 km ENE of Athol, Idaho M3.5 75 km 5 km
Mar 8, 1994 32 km S of Wallace, Idaho M3.4 142 km 5 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 M3.4 132 km 2 km
Jun 25, 2001 2 km SSE of Town and Country, Washington M3.4 29 km 10 km
Dec 15, 2012 19 km S of Troy, Montana M3.4 122 km 1 km
Nov 12, 2001 3 km NNE of Spokane, Washington M3.3 31 km 0 km
May 10, 2000 Idaho-Montana border region M3.3 136 km 2 km
Sep 22, 2003 12 km NW of Rathdrum, Idaho M3.3 32 km 13 km
Feb 11, 2025 2 km NNW of Mullan, Idaho M3.3 133 km 5 km
Apr 24, 2015 7 km SW of Hope, Idaho M3.3 83 km 10 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

39 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 2 injuries.

Date Rating Distance Path Fatalities
Apr 5, 1972 EF3 84 km 0.1 mi 0
May 31, 1997 EF2 65 km 5.0 mi 0
Apr 9, 1991 EF2 47 km 1.0 mi 0
Jul 17, 1978 EF2 33 km 0.1 mi 0
Apr 5, 1972 EF2 86 km 1.0 mi 0
May 6, 1957 EF2 57 km 1.5 mi 0
Jun 15, 1954 EF2 60 km 0.5 mi 0
May 6, 2009 EF1 56 km 3.4 mi 0
Jul 21, 1997 EF1 84 km 1.0 mi 0
Jul 21, 1997 EF1 84 km 1.0 mi 0
May 31, 1997 EF1 14 km 5.0 mi 0
May 29, 1994 EF1 81 km 0.1 mi 0
Apr 12, 1984 EF1 31 km 1.0 mi 0
Oct 17, 1983 EF1 55 km 0.5 mi 0
Jul 25, 1983 EF1 71 km 0.2 mi 0
Jun 22, 1981 EF1 2 km 0.1 mi 0
Aug 14, 1980 EF1 65 km 0.1 mi 0
Aug 19, 1978 EF1 73 km 1.9 mi 0
Jun 29, 1970 EF1 27 km 0.1 mi 0
Apr 18, 2024 EF0 35 km 0.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

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

Year Location Cause Max Wave Deaths Distance
1952 COLUMBIA RIVER VALLEY, WA Meteorological 19.8 m — 85 km
1949 COLUMBIA RIVER VALLEY, WA Meteorological 19.8 m — 71 km
2024 COLUMBIA RIVER VALLEY, WA Meteorological 14.3 m — 85 km
1944 COLUMBIA RIVER VALLEY, WA Meteorological 9.1 m — 85 km
2009 COLUMBIA RIVER VALLEY, WA Meteorological 9.0 m — 48 km
1953 COLUMBIA RIVER VALLEY, WA Meteorological 4.8 m — 85 km
2009 COLUMBIA RIVER VALLEY, WA Meteorological 3.6 m — 54 km
1953 COLUMBIA RIVER VALLEY, WA Meteorological — — 85 km
1952 COLUMBIA RIVER VALLEY, WA Meteorological — — 85 km
Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: WHITNEY (127,930 acres, 2020).

Year Name Acres Burned Distance
2020 WHITNEY 127,930 93 km
2015 CARPENTER RD. 62,488 49 km
2021 SUMMIT TRAIL 54,855 86 km
2019 WILLIAMS FLATS 44,680 79 km
2014 DEVILS ELBOW COMPLEX 25,988 99 km
2012 APACHE PASS 25,101 96 km
2015 TOWER 24,779 62 km
2008 SWANSON LAKE 18,941 77 km
2021 FORD CORKSCREW 16,179 21 km
1991 UNNAMED 12,401 30 km
2020 KEWA FIELD 11,811 69 km
2023 OREGON 10,957 18 km
2003 RATTLESNAKE CANYON 10,655 72 km
2023 GRAY 10,096 51 km
2016 CAYUSE MTN 9,744 47 km
2014 WATERMELON HILL 9,321 74 km
2015 LOWER FLAT 9,034 99 km
2015 GRAVES MOUNTAIN 8,559 99 km
1988 S.17MILE1 8,089 99 km
2003 HATTEN ROAD 7,247 93 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 28°F (-3°C) 2.4 in Coldest
February 32°F (-0°C) 1.9 in
March 39°F (4°C) 1.8 in
April 47°F (8°C) 1.5 in
May 54°F (12°C) 1.8 in
June 61°F (16°C) 1.5 in
July 66°F (19°C) 0.9 in Driest
August 68°F (20°C) 0.9 in Warmest
September 58°F (15°C) 1.0 in
October 47°F (8°C) 1.3 in
November 35°F (2°C) 2.7 in
December 28°F (-2°C) 2.9 in Wettest

Deer Park has a seasonal temperature swing of 40°F / from 28°F in January to 68°F in August. Total annual precipitation is 20.4 inches, with December being the wettest month (2.9") and July the driest (0.9").

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