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Weather & Climate in O'Brien, OR

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

O'Brien experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 41°F in January while summers reach 73°F in July. The area gets 257 sunny days per year, above the national average. Annual precipitation totals 61.2 inches (wetter than the 38-inch national average). The area receives 7.1 inches of snow annually. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 1,475 feet.

Temperature

41°F Jan (5°C) 73°F Jul (23°C)
Annual Average54.9°F
2% above US avg
January Average41°F (5°C)
July Average73°F (23°C)
Sunny Days257 days/yr

Geography

Elevation1,475 ft (450 m)
Area5.2 sq mi (13.5 km²)
Population Density101/sq mi
Coordinates42.0799°N, 123.7046°W
TimezoneAmerica/Los_Angeles
CountyJosephine County County
Nearest AirportRogue Valley International - Medford (MFR)
47 miles away

Precipitation & Snow

Annual Rainfall 61.2"
61% above US avg
Snowfall 7.1"
Wettest Month (Dec) 12.05"
Driest Month (Jul) 0.35"

Air Quality

AQI Median32.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score90.2 / 100
Social Vulnerability66.4 / 100
Community Resilience49.8 / 100

Hazard Breakdown

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

Earthquake History

625 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.

Sep 21, 1993 27 km WNW of Klamath Falls, Oregon M6.0 139 km 9 km
Sep 21, 1993 22 km WNW of Klamath Falls, Oregon M5.9 141 km 9 km
Feb 13, 2012 26 km NNW of Willow Creek, California M5.6 104 km 27 km
Apr 30, 2008 3 km NNW of Burnt Ranch, California M5.4 139 km 28 km
Dec 4, 1993 20 km WNW of Klamath Falls, Oregon M5.1 142 km 5 km
Jun 25, 2007 57 km W of Trinidad, California M5.0 142 km 3 km
Oct 11, 2013 50 km WNW of Samoa, California M4.9 150 km 9 km
Jan 18, 1990 27 km ESE of Orick, California M4.9 101 km 35 km
Feb 6, 2019 13km ESE of Blue Lake, CA M4.4 138 km 26 km
Sep 22, 2000 22 km W of Samoa, California M4.4 150 km 13 km
Jan 23, 2024 16 km WSW of Klamath, CA M4.3 77 km 36 km
Jul 29, 1991 38 km W of Crescent City, California M4.3 86 km 28 km
May 15, 2002 9 km W of Klamath Falls, Oregon M4.3 150 km 6 km
Sep 21, 1993 25 km SW of Chiloquin, Oregon M4.3 140 km -2 km
Jan 19, 1994 15 km WNW of Klamath Falls, Oregon M4.3 147 km -1 km
Jan 9, 1994 12 km WNW of Klamath Falls, Oregon M4.3 148 km 1 km
Mar 16, 1999 94 km WSW of Pistol River, Oregon M4.3 149 km 10 km
Jan 20, 2023 16km WSW of Weitchpec, CA M4.3 107 km 25 km
Feb 26, 2009 37 km NW of Selma, Oregon M4.2 54 km 37 km
Oct 15, 1998 4 km SSW of Trinity Village, California M4.2 139 km 25 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

9 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1.

Date Rating Distance Path Fatalities
Dec 30, 1992 EF1 55 km 0.2 mi 0
Dec 11, 1992 EF1 55 km 0.2 mi 0
Oct 24, 2010 EF0 91 km 1.0 mi 0
Nov 9, 2002 EF0 48 km 0.5 mi 0
Jan 20, 1996 EF0 55 km 0.1 mi 0
Jan 20, 1996 EF0 41 km 0.3 mi 0
Mar 22, 1983 EF0 48 km 0.1 mi 0
May 13, 1960 EF0 64 km 0.1 mi 0
Jan 10, 1958 EF0 55 km 0.8 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

1 tsunami recorded within 500 km. Highest wave on record: 3.1 m (10 ft).

Year Location Cause Max Wave Deaths Distance
1873 N. CALIFORNIA Eruption + Earthquake 3.1 m — 26 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Shasta (146 km).

Name Type Elevation Last Eruption Distance
Shasta Stratovolcano 4,317 m (14,163 ft) 1250 146 km
Crater Lake Caldera 2,487 m (8,159 ft) -2850 161 km
Cinnamon Butte Pyroclastic cone(s) 1,956 m (6,417 ft) Unknown 184 km
Medicine Lake Shield 2,412 m (7,913 ft) 1060 186 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: BISCUIT COMPLEX (BISCUIT) (495,308 acres, 2002).

Year Name Acres Burned Distance
2002 BISCUIT COMPLEX (BISCUIT) 495,308 43 km
2017 CHETCO BAR 194,877 33 km
2018 KLONDIKE 178,311 40 km
2020 SLATER 157,784 21 km
2014 HAPPY CAMP COMPLEX 118,491 59 km
2008 SISKIYOU-BLUE 2 COMPLEX (BLUE 2) 100,823 52 km
1987 SILVER 96,698 37 km
2021 MCCASH 95,762 66 km
2017 OAK 95,692 38 km
2023 KELLY 90,267 22 km
2008 PANTHER 71,448 66 km
1987 KING TITUS 71,390 56 km
2017 ISLAND 62,931 88 km
2022 MCKINNEY 60,592 78 km
2018 TAYLOR CREEK 57,505 46 km
1987 YELLOW 2 53,626 81 km
2008 BEAR WALLOW COMPLEX (UKONOM) 40,029 88 km
2018 NATCHEZ 38,800 24 km
2018 KLAMATHON 38,188 98 km
1987 FORT COPPER 36,333 45 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 41°F (5°C) 11.1 in
February 43°F (6°C) 8.7 in
March 45°F (7°C) 8.3 in
April 47°F (9°C) 4.4 in
May 53°F (12°C) 2.4 in
June 59°F (15°C) 1.0 in
July 73°F (23°C) 0.4 in Warmest, Driest
August 66°F (19°C) 0.9 in
September 62°F (16°C) 1.5 in
October 53°F (12°C) 4.5 in
November 45°F (7°C) 10.7 in
December 40°F (4°C) 12.1 in Coldest, Wettest

O'Brien has a seasonal temperature swing of 33°F / from 40°F in December to 73°F in July. Total annual precipitation is 65.9 inches, with December being the wettest month (12.1") and July the driest (0.4").

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