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Weather & Climate in Heppner, OR

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

Heppner experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 36°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 13.1 inches (drier than the 38-inch national average). The area receives 12.8 inches of snow annually. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 2,297 feet.

Temperature

36°F Jan (2°C) 71°F Jul (22°C)
Annual Average51.7°F
4% below US avg
January Average36°F (2°C)
July Average71°F (22°C)
Sunny Days311 days/yr

Geography

Elevation2,297 ft (700 m)
Area0.5 sq mi (1.2 km²)
Population Density1,154/sq mi
Coordinates45.3529°N, 119.5605°W
TimezoneAmerica/Los_Angeles
CountyMorrow County County
Nearest AirportEastern Oregon Regional At Pendleton (PDT)
44 miles away

Precipitation & Snow

Annual Rainfall 13.1"
66% below US avg
Snowfall 12.8"
Wettest Month (Nov) 1.81"
Driest Month (Jul) 0.35"

Air Quality

AQI Median32.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score26.4 / 100
Social Vulnerability26.6 / 100
Community Resilience2.8 / 100

Hazard Breakdown

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

Earthquake History

179 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 M4.3 120 km 9 km
Jun 17, 2010 30 km S of White Swan, Washington M4.2 124 km 3 km
Jul 14, 2008 11 km ESE of Maupin, Oregon M4.2 112 km 16 km
Jul 14, 1992 6 km S of Walla Walla East, Washington M4.1 121 km 11 km
Jan 30, 2000 6 km SE of Condon, Oregon M4.1 47 km -1 km
Oct 9, 1998 20 km S of White Swan, Washington M4.0 130 km 2 km
Mar 22, 1997 10 km ESE of Condon, Oregon M3.9 43 km 0 km
Aug 7, 1992 8 km WSW of Irrigon, Oregon M3.9 57 km 0 km
Nov 18, 1997 20 km NW of Bickleton, Washington M3.9 113 km 15 km
Jun 14, 2007 12 km ESE of Maupin, Oregon M3.8 111 km 18 km
May 18, 2008 11 km SSW of Benton City, Washington M3.7 91 km 20 km
Sep 4, 2011 14 km N of Richland, Washington M3.7 120 km 2 km
Feb 1, 2000 7 km SE of Condon, Oregon M3.6 47 km -1 km
Apr 5, 2008 12 km ESE of Maupin, Oregon M3.6 111 km 18 km
Apr 20, 2009 10 km ESE of Maupin, Oregon M3.6 112 km 15 km
Jan 2, 2010 10 km ESE of Maupin, Oregon M3.6 112 km 14 km
Mar 1, 2007 Washington-Oregon border region M3.6 111 km 23 km
Jan 23, 2015 3 km N of Cayuse, Oregon M3.5 88 km 20 km
Aug 31, 1999 Washington-Oregon border region M3.5 45 km 3 km
Oct 12, 2017 25 km NW of Bickleton, Washington M3.4 117 km 13 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
Jun 26, 1958 EF2 94 km 0.3 mi 0
May 6, 2009 EF1 91 km 1.6 mi 0
May 19, 2006 EF1 54 km 0.1 mi 0
Jul 19, 2004 EF1 60 km 2.2 mi 0
Jun 8, 2016 EF0 95 km 0.2 mi 0
May 22, 2016 EF0 99 km 0.2 mi 0
Apr 14, 2011 EF0 14 km 0.2 mi 0
Jun 7, 2004 EF0 77 km 0.5 mi 0
May 23, 2004 EF0 50 km 0.1 mi 0
Oct 4, 2003 EF0 85 km 0.2 mi 0
Jul 13, 2002 EF0 69 km 0.2 mi 0
Jul 9, 1995 EF0 57 km 0.1 mi 0
May 1, 1991 EF0 87 km 0.1 mi 0
May 22, 1964 EF0 96 km 10.7 mi 0
Apr 12, 1957 EF0 43 km 16.2 mi 0
May 9, 1956 EF0 88 km 10.2 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Hood (167 km).

Name Type Elevation Last Eruption Distance
Hood Stratovolcano 3,426 m (11,240 ft) 1866 167 km
Adams Stratovolcano 3,742 m (12,277 ft) 950 177 km
Indian Heaven Shield(s) 1,806 m (5,925 ft) -6250 187 km
Jefferson Stratovolcano 3,199 m (10,495 ft) 950 192 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

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 45 km
2000 MULE DRY 90,184 80 km
2011 HANCOCK COMPLEX 71,495 78 km
2023 NEWELL ROAD 61,833 82 km
2007 MONUMENT COMPLEX (RED HILL FIRE) 54,572 46 km
2024 BIG HORN 51,023 71 km
1996 TOWER 50,827 77 km
2018 STUBBLEFIELD 1008 RN 49,160 70 km
2018 JENNIES PEAK 1039 RN 47,664 83 km
2008 COAL PLANT 45,801 39 km
2014 BLACK ROCK 40,760 87 km
1996 BULL COMPLEX (SUMMIT) 36,318 97 km
2015 HIGHWAY 8 35,296 70 km
2016 0353 RN SCOTT CANYON 32,051 58 km
2014 PINE CREEK 31,033 83 km
2001 MONUMENT COMPLEX (MALLORY) 29,095 50 km
2007 HORSE HEAVEN COMPLEX (SIX PRONG) 28,225 73 km
2000 UNNAMED 27,815 28 km
2015 UNNAMED 27,736 40 km
2024 SERVICE 25,270 61 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 36°F (2°C) 1.6 in
February 37°F (3°C) 1.3 in
March 42°F (6°C) 1.5 in
April 48°F (9°C) 1.3 in
May 55°F (13°C) 1.4 in
June 62°F (17°C) 1.0 in
July 71°F (22°C) 0.4 in Warmest, Driest
August 69°F (20°C) 0.6 in
September 61°F (16°C) 0.7 in
October 50°F (10°C) 1.1 in
November 40°F (5°C) 1.8 in Wettest
December 33°F (1°C) 1.5 in Coldest

Heppner has a seasonal temperature swing of 38°F / from 33°F in December to 71°F in July. Total annual precipitation is 14.0 inches, with November being the wettest month (1.8") and July the driest (0.4").

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