Weather & Climate in Mission, OR

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

Mission experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 35°F in January while summers reach 71°F in July. The area gets 311 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 17.2 inches (drier than the 38-inch national average). The area receives 14.9 inches of snow annually. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 1,423 feet.

Temperature

35°F Jan (2°C) 71°F Jul (22°C)

Annual Average	50.6°F
	6% below US avg
January Average	35°F (2°C)
July Average	71°F (22°C)
Sunny Days	311 days/yr

Geography

Elevation	1,423 ft (434 m)
Area	7.6 sq mi (19.7 km²)
Population Density	123/sq mi
Coordinates	45.6586°N, 118.6655°W
Timezone	America/Los_Angeles
County	Umatilla County County
Nearest Airport	Eastern Oregon Regional At Pendleton (PDT) 7 miles away

Precipitation & Snow

Annual Rainfall 17.2"

55% below US avg

Snowfall 14.9"

Wettest Month (Nov) 2.68"

Driest Month (Jul) 0.51"

Air Quality

AQI Median	32.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	82.3 / 100
Social Vulnerability	59.6 / 100
Community Resilience	15.9 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Relatively Low
Wildfire	Relatively Moderate
Flood	Relatively Moderate
Hail	Relatively Low
Strong Wind	Relatively Moderate
Heat Wave	Relatively Moderate
Winter Weather	Relatively High
Lightning	Relatively Low
Ice Storm	Relatively High
Drought	Relatively Moderate
Cold Wave	Relatively High
Landslide	Relatively Moderate
Volcano	Very Low
Avalanche	Relatively Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

160 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	46 km	9 km
Jan 30, 2000	6 km SE of Condon, Oregon	M4.1	125 km	-1 km
Jul 14, 1992	6 km S of Walla Walla East, Washington	M4.1	46 km	11 km
Nov 18, 1997	20 km NW of Bickleton, Washington	M3.9	150 km	15 km
Aug 7, 1992	8 km WSW of Irrigon, Oregon	M3.9	75 km	0 km
Mar 22, 1997	10 km ESE of Condon, Oregon	M3.9	121 km	0 km
Sep 4, 2011	14 km N of Richland, Washington	M3.7	95 km	2 km
May 18, 2008	11 km SSW of Benton City, Washington	M3.7	89 km	20 km
Feb 1, 2000	7 km SE of Condon, Oregon	M3.6	124 km	-1 km
Jan 23, 2015	3 km N of Cayuse, Oregon	M3.5	11 km	20 km
Aug 31, 1999	Washington-Oregon border region	M3.5	123 km	3 km
Jan 13, 1994	11 km SW of Lind, Washington	M3.4	137 km	0 km
Nov 6, 1997	22 km SE of Desert Aire, Washington	M3.4	126 km	22 km
Oct 15, 2011	13 km N of Richland, Washington	M3.4	95 km	1 km
Jan 30, 2000	8 km SE of Condon, Oregon	M3.4	124 km	-1 km
Jun 17, 2004	11 km SSE of Washtucna, Washington	M3.4	117 km	17 km
Jun 12, 1995	13 km N of Richland, Washington	M3.3	95 km	1 km
Dec 15, 1991	6 km SSW of Walla Walla East, Washington	M3.3	46 km	8 km
May 1, 2011	13 km N of Richland, Washington	M3.3	95 km	2 km
Feb 28, 2004	10 km WSW of Wallula, Washington	M3.3	50 km	1 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date	Rating	Distance	Path	Fatalities
Jun 26, 1958	EF2	50 km	0.3 mi	0
May 6, 2022	EF1	33 km	2.9 mi	0
May 6, 2009	EF1	14 km	1.6 mi	0
May 19, 2006	EF1	81 km	0.1 mi	0
Jul 19, 2004	EF1	96 km	2.2 mi	0
Jan 16, 2000	EF1	90 km	1.0 mi	0
Mar 5, 2024	EF0	30 km	0.2 mi	0
Jun 27, 2023	EF0	46 km	0.1 mi	0
Mar 31, 2020	EF0	89 km	0.1 mi	0
May 22, 2016	EF0	72 km	0.2 mi	0
Apr 14, 2011	EF0	86 km	0.2 mi	0
May 6, 2009	EF0	88 km	0.2 mi	0
Jun 7, 2004	EF0	94 km	0.5 mi	0
May 23, 2004	EF0	48 km	0.1 mi	0
Jul 13, 2002	EF0	14 km	0.2 mi	0
Jul 9, 1995	EF0	49 km	0.1 mi	0
May 1, 1991	EF0	14 km	0.1 mi	0
Aug 24, 1987	EF0	53 km	0.2 mi	0
Jun 21, 1983	EF0	58 km	0.1 mi	0
May 22, 1964	EF0	27 km	10.7 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: BATTLE MOUNTAIN COMPLEX (184,979 acres, 2024).

Year	Name	Acres Burned	Distance
2024	BATTLE MOUNTAIN COMPLEX	184,979	87 km
2006	COLUMBIA COMPLEX	118,865	87 km
2015	BUTTE CREEK	79,418	90 km
2007	MONUMENT COMPLEX (RED HILL FIRE)	54,572	97 km
1996	TOWER	50,827	69 km
2008	COAL PLANT	45,801	81 km
2021	GREEN RIDGE	44,604	97 km
2001	MONUMENT COMPLEX (MALLORY)	29,095	97 km
2000	UNNAMED	27,815	50 km
2015	UNNAMED	27,736	86 km
2021	ELBOW CREEK	23,103	86 km
2022	STURGILL	21,641	96 km
1996	UNNAMED	21,130	42 km
2005	WALKER CANYON	20,764	90 km
2010	EUREKA	19,811	88 km
2024	JACK CANYON MUTUAL AID	18,287	35 km
2023	HAT ROCK	17,264	43 km
1990	LOCUSTGROV	17,187	61 km
2020	KAHLOTUS	16,738	98 km
2009	NORTH FORK COMPLEX	16,461	82 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	35°F (2°C)	2.6 in
February	36°F (2°C)	2.0 in
March	40°F (5°C)	2.1 in
April	46°F (8°C)	1.8 in
May	53°F (11°C)	1.8 in
June	60°F (15°C)	1.4 in
July	71°F (22°C)	0.5 in	Warmest, Driest
August	66°F (19°C)	0.8 in
September	58°F (15°C)	0.9 in
October	49°F (9°C)	1.7 in
November	39°F (4°C)	2.7 in	Wettest
December	32°F (-0°C)	2.7 in	Coldest

Mission has a seasonal temperature swing of 39°F / from 32°F in December to 71°F in July. Total annual precipitation is 20.9 inches, with November being the wettest month (2.7") and July the driest (0.5").

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