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Weather & Climate in Hartline, WA

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

Hartline experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 28°F in January while summers reach 72°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 10.9 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 1,914 feet.

Temperature

28°F Jan (-3°C) 72°F Jul (22°C)
Annual Average48.8°F
10% below US avg
January Average28°F (-3°C)
July Average72°F (22°C)
Sunny Days273 days/yr

Geography

Elevation1,914 ft (583 m)
Area0.1 sq mi (0.3 km²)
Population Density658/sq mi
Coordinates47.6894°N, 119.1081°W
TimezoneAmerica/Los_Angeles
CountyDouglas County County
Nearest AirportGrant County International (MWH)
35 miles away

Precipitation & Snow

Annual Rainfall 10.9"
71% below US avg
Wettest Month (Dec) 1.65"
Driest Month (Aug) 0.51"

Air Quality

AQI Median28.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score74.1 / 100
Social Vulnerability62.5 / 100
Community Resilience19.7 / 100

Hazard Breakdown

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

Earthquake History

236 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.

Jun 24, 1997 16 km WNW of Malott, Washington M4.6 95 km 10 km
Jun 27, 2013 25 km N of Leavenworth, Washington M4.3 119 km 8 km
Feb 18, 2015 15 km ENE of Cle Elum, Washington M4.2 133 km 4 km
Sep 1, 2015 15 km N of Nespelem Community, Washington M4.2 69 km 9 km
Nov 11, 2001 3 km NE of Spokane, Washington M4.0 128 km 4 km
Jun 25, 2001 Washington M3.9 128 km 10 km
Apr 15, 1991 4 km SE of Pateros, Washington M3.9 68 km 11 km
Jul 4, 1997 8 km NNE of Waterville, Washington M3.7 70 km 7 km
Sep 4, 2011 14 km N of Richland, Washington M3.7 143 km 2 km
Jan 1, 1997 14 km NNE of Selah, Washington M3.7 144 km 18 km
Jun 24, 1997 16 km NW of Malott, Washington M3.6 96 km 7 km
Dec 24, 2000 8 km NNW of Entiat, Washington M3.5 87 km 7 km
Jan 13, 1994 11 km SW of Lind, Washington M3.4 94 km 0 km
Jun 25, 2001 2 km SSE of Town and Country, Washington M3.4 127 km 10 km
Oct 15, 2011 13 km N of Richland, Washington M3.4 143 km 1 km
Jun 6, 2002 7 km NW of Entiat, Washington M3.4 88 km 6 km
Jul 6, 1991 7 km SE of Kittitas, Washington M3.4 125 km 3 km
Jan 24, 1992 4 km WNW of Waterville, Washington M3.4 77 km 6 km
Dec 22, 1990 9 km NW of Mattawa, Washington M3.4 119 km 3 km
Feb 1, 1991 14 km NE of Naches, Washington M3.4 147 km 6 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

29 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 injury.

Date Rating Distance Path Fatalities
Apr 5, 1972 EF3 45 km 0.1 mi 0
Apr 5, 1972 EF2 1 km 0.1 mi 0
May 6, 2009 EF1 73 km 3.4 mi 0
Jul 21, 1997 EF1 54 km 5.0 mi 0
Jul 21, 1997 EF1 54 km 5.0 mi 0
May 31, 1997 EF1 31 km 12.0 mi 0
May 30, 1987 EF1 72 km 1.0 mi 0
Aug 10, 1985 EF1 79 km 1.0 mi 0
May 3, 1982 EF1 87 km 0.1 mi 0
Aug 15, 1978 EF1 14 km 0.1 mi 0
May 1, 2024 EF0 99 km 0.4 mi 0
Mar 26, 2024 EF0 65 km 0.0 mi 0
Jul 10, 2023 EF0 27 km 0.9 mi 0
May 26, 2023 EF0 64 km 0.4 mi 0
Jul 22, 2016 EF0 25 km 0.2 mi 0
May 19, 2010 EF0 56 km 0.2 mi 0
Jun 6, 2009 EF0 41 km 1.3 mi 0
Jun 6, 2009 EF0 40 km 1.7 mi 0
Jun 6, 2009 EF0 40 km 2.4 mi 0
Jun 6, 2009 EF0 40 km 2.4 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 — 121 km
1949 COLUMBIA RIVER VALLEY, WA Meteorological 19.8 m — 58 km
2024 COLUMBIA RIVER VALLEY, WA Meteorological 14.3 m — 122 km
1944 COLUMBIA RIVER VALLEY, WA Meteorological 9.1 m — 121 km
2009 COLUMBIA RIVER VALLEY, WA Meteorological 9.0 m — 81 km
1953 COLUMBIA RIVER VALLEY, WA Meteorological 4.8 m — 121 km
2009 COLUMBIA RIVER VALLEY, WA Meteorological 3.6 m — 75 km
1953 COLUMBIA RIVER VALLEY, WA Meteorological — — 121 km
1952 COLUMBIA RIVER VALLEY, WA Meteorological — — 121 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Glacier Peak (157 km).

Name Type Elevation Last Eruption Distance
Glacier Peak Stratovolcano 3,213 m (10,541 ft) 1700 157 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: CARLTON COMPLEX (276,249 acres, 2014).

Year Name Acres Burned Distance
2014 CARLTON COMPLEX 276,249 89 km
2015 NORTH STAR 218,547 82 km
2020 PEARL HILL 217,720 43 km
2020 COLD SPRINGS 187,561 66 km
2015 TUNK BLOCK 180,111 89 km
2020 WHITNEY 127,930 41 km
1994 TYEE CREEK 123,618 96 km
2012 BARKER CANYON COMPLEX 85,906 37 km
2013 COLOCKUM TARPS 79,279 96 km
2018 GRASS VALLEY 76,074 28 km
2015 CARPENTER RD. 62,488 86 km
2015 BLACK CANYON 61,379 77 km
2021 WHITMORE 59,925 59 km
2021 SUMMIT TRAIL 54,855 91 km
2019 WILLIAMS FLATS 44,680 56 km
2002 DEER POINT 41,348 88 km
2021 CHUWEAH CREEK FIRE 37,393 54 km
1988 DINKELMAN 36,246 94 km
2001 VIRGINIA L 35,780 73 km
2001 ST MARYS 34,914 71 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 28°F (-3°C) 1.1 in
February 32°F (-0°C) 1.1 in
March 40°F (4°C) 1.0 in
April 47°F (8°C) 0.8 in
May 55°F (13°C) 1.0 in
June 62°F (17°C) 0.8 in
July 72°F (22°C) 0.6 in Warmest
August 69°F (21°C) 0.5 in Driest
September 60°F (15°C) 0.6 in
October 48°F (9°C) 0.6 in
November 35°F (2°C) 1.5 in
December 26°F (-3°C) 1.7 in Coldest, Wettest

Hartline has a seasonal temperature swing of 46°F / from 26°F in December to 72°F in July. Total annual precipitation is 11.3 inches, with December being the wettest month (1.7") and August the driest (0.5").

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