Weather & Climate in Umapine, OR

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

Umapine enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 37°F in January while summers reach 77°F in July. Annual precipitation totals 16.1 inches (drier than the 38-inch national average). The area receives 7.2 inches of snow annually. Air quality is rated Good with a median AQI of 38. 74% of days have good air quality. The city sits at an elevation of 669 feet.

Temperature

37°F Jan (3°C) 77°F Jul (25°C)
Annual Average55.5°F
3% above US avg
January Average37°F (3°C)
July Average77°F (25°C)

Geography

Elevation669 ft (204 m)
Area3.3 sq mi (8.6 km²)
Population Density215/sq mi
Coordinates45.9759°N, 118.5009°W
TimezoneAmerica/Los_Angeles
CountyUmatilla County County
Nearest AirportWalla Walla Regional (ALW)
13 miles away

Precipitation & Snow

Annual Rainfall 16.1"
58% below US avg
Snowfall 7.2"
Wettest Month (Dec) 2.06"
Driest Month (Jul) 0.34"

Air Quality

AQI Median38.0
RatingGood
Good Days %74.3%
Unhealthy Days4

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score82.3 / 100
Social Vulnerability59.6 / 100
Community Resilience15.9 / 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

143 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 14 km 9 km
Jul 14, 1992 6 km S of Walla Walla East, Washington M4.1 15 km 11 km
Mar 22, 1997 10 km ESE of Condon, Oregon M3.9 150 km 0 km
Aug 7, 1992 8 km WSW of Irrigon, Oregon M3.9 85 km 0 km
Jun 28, 1998 3 km SE of Genesee, Idaho M3.8 138 km 10 km
May 18, 2008 11 km SSW of Benton City, Washington M3.7 84 km 20 km
Sep 4, 2011 14 km N of Richland, Washington M3.7 76 km 2 km
Jan 23, 2015 3 km N of Cayuse, Oregon M3.5 30 km 20 km
Oct 15, 2011 13 km N of Richland, Washington M3.4 76 km 1 km
Nov 6, 1997 22 km SE of Desert Aire, Washington M3.4 112 km 22 km
Jan 13, 1994 11 km SW of Lind, Washington M3.4 103 km 0 km
Dec 22, 1990 9 km NW of Mattawa, Washington M3.4 147 km 3 km
Jun 17, 2004 11 km SSE of Washtucna, Washington M3.4 80 km 17 km
Jun 12, 1995 13 km N of Richland, Washington M3.3 76 km 1 km
May 27, 1997 15 km W of Othello, Washington M3.3 117 km 2 km
Feb 28, 2004 10 km WSW of Wallula, Washington M3.3 41 km 1 km
May 1, 2011 13 km N of Richland, Washington M3.3 75 km 2 km
Jun 19, 1990 11 km W of Othello, Washington M3.3 115 km 2 km
Apr 22, 1990 20 km SE of Desert Aire, Washington M3.3 114 km 21 km
Dec 15, 1991 6 km SSW of Walla Walla East, Washington M3.3 14 km 8 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
Jun 11, 1968 EF2 92 km 9.6 mi 0
Mar 14, 1966 EF2 79 km 1.0 mi 0
Jun 26, 1958 EF2 35 km 0.3 mi 0
May 6, 2022 EF1 27 km 2.9 mi 0
May 6, 2009 EF1 29 km 1.6 mi 0
May 19, 2006 EF1 93 km 0.1 mi 0
Jan 16, 2000 EF1 54 km 1.0 mi 0
Apr 23, 1983 EF1 73 km 3.0 mi 0
Jul 1, 1978 EF1 87 km 2.3 mi 0
Mar 5, 2024 EF0 13 km 0.2 mi 0
Jun 27, 2023 EF0 17 km 0.1 mi 0
Mar 31, 2020 EF0 72 km 0.1 mi 0
May 22, 2016 EF0 57 km 0.2 mi 0
May 6, 2009 EF0 87 km 0.2 mi 0
Jun 7, 2004 EF0 97 km 0.5 mi 0
May 23, 2004 EF0 65 km 0.1 mi 0
Jul 13, 2002 EF0 40 km 0.2 mi 0
Jul 9, 1995 EF0 61 km 0.1 mi 0
May 1, 1991 EF0 24 km 0.1 mi 0
Aug 24, 1987 EF0 18 km 0.2 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: 24 COMMAND (162,300 acres, 2000).

Year Name Acres Burned Distance
2000 24 COMMAND 162,300 98 km
1984 HANFORD 122,914 96 km
2006 COLUMBIA COMPLEX 118,865 58 km
2021 LICK CREEK 80,376 88 km
2015 BUTTE CREEK 79,418 69 km
2005 SCHOOL 51,701 76 km
2008 COAL PLANT 45,801 99 km
2021 GREEN RIDGE 44,604 69 km
2000 UNNAMED 27,815 81 km
2021 ELBOW CREEK 23,103 71 km
1996 UNNAMED 21,130 25 km
2005 WALKER CANYON 20,764 54 km
2010 EUREKA 19,811 53 km
2024 JACK CANYON MUTUAL AID 18,287 71 km
2023 HAT ROCK 17,264 40 km
1990 LOCUSTGROV 17,187 58 km
2020 KAHLOTUS 16,738 63 km
2010 UNNAMED 16,737 69 km
2018 LAKE WALLULA 11,972 41 km
2020 EAST FORK BUTTER CREEK 11,496 86 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 37°F (3°C) 1.8 in
February 41°F (5°C) 1.5 in
March 48°F (9°C) 1.7 in
April 54°F (12°C) 1.6 in
May 62°F (17°C) 1.8 in
June 68°F (20°C) 1.3 in
July 77°F (25°C) 0.3 in Warmest, Driest
August 76°F (24°C) 0.4 in
September 67°F (19°C) 0.6 in
October 55°F (13°C) 1.2 in
November 44°F (6°C) 1.9 in
December 37°F (3°C) 2.1 in Coldest, Wettest

Umapine has a seasonal temperature swing of 40°F / from 37°F in December to 77°F in July. Total annual precipitation is 16.2 inches, with December being the wettest month (2.1") and July the driest (0.3").

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