Weather & Climate in Oak Glen, CA

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

Oak Glen enjoys a temperate climate with an average annual temperature of 65°F (18°C). Winters average 54°F in January while summers reach 79°F in July. Annual precipitation totals 12.9 inches (drier than the 38-inch national average). Air quality is rated Moderate with a median AQI of 87 / residents may notice occasional air quality concerns. 11% of days have good air quality. The city sits at an elevation of 5,280 feet.

Temperature

54°F Jan (12°C) 79°F Jul (26°C)
Annual Average65.2°F
21% above US avg
January Average54°F (12°C)
July Average79°F (26°C)

Geography

Elevation5,280 ft (1,609 m)
Area14.9 sq mi (38.5 km²)
Population Density26/sq mi
Coordinates34.0410°N, 116.9623°W
TimezoneAmerica/Los_Angeles
CountySan Bernardino County County
Nearest AirportSan Bernardino International (SBD)
16 miles away

Precipitation & Snow

Annual Rainfall 12.9"
66% below US avg
Snowfall 0.0"
Wettest Month (Feb) 2.99"
Driest Month (Aug) 0.09"

Air Quality

AQI Median87.0
RatingModerate
Good Days %10.9%
Unhealthy Days144

Natural Hazard Risk

Overall RiskVery High
Risk Score99.8 / 100
Social Vulnerability33.2 / 100
Community Resilience20.1 / 100

Hazard Breakdown

Tornado Relatively Moderate
Hurricane No Rating
Earthquake Very High
Wildfire Very High
Flood Very High
Hail Relatively Moderate
Strong Wind Relatively High
Heat Wave Relatively High
Winter Weather Relatively Low
Lightning Relatively High
Drought Relatively Low
Cold Wave Relatively Low
Landslide Very High
Volcano Very Low
Avalanche Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

13,121 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.3.

Jun 28, 1992 The 1992 Landers, California Earthquake M7.3 52 km 0 km
Oct 16, 1999 The 1999 Hector Mine, California Earthquake M7.1 90 km 14 km
Jan 17, 1994 Northridge, California, earthquake M6.7 146 km 18 km
Jun 28, 1992 The 1992 Big Bear, California Earthquake M6.3 22 km 4 km
Apr 23, 1992 The 1992 Joshua Tree, California Earthquake M6.1 60 km 12 km
Jan 17, 1994 1km ENE of Granada Hills, California M5.9 143 km 5 km
Jun 28, 1991 The 1991 Sierra Madre, California Earthquake M5.8 98 km 8 km
Oct 16, 1999 13km WSW of Ludlow, CA M5.8 94 km 14 km
Jun 28, 1992 3km NE of Yucca Valley, California M5.8 52 km -1 km
Jun 28, 1992 2km SSW of Joshua Tree, California M5.7 60 km 6 km
Jun 29, 1992 3km ESE of Yucca Valley, California M5.7 52 km 10 km
Oct 16, 1999 7km ENE of Running Springs, CA M5.6 23 km 6 km
Jun 28, 1992 11km SSE of Big Bear Lake, California M5.5 17 km 10 km
Feb 28, 1990 The 1990 Upland, California Earthquake M5.5 69 km 3 km
Jun 28, 1992 0km E of Yucca Valley, CA M5.5 50 km 8 km
Jul 5, 1992 21km SW of Ludlow, California M5.4 84 km 5 km
Jul 7, 2010 20km NNW of Borrego Springs, CA M5.4 83 km 12 km
Jun 28, 1992 26km NNW of Yucca Valley, CA M5.4 53 km 4 km
Oct 16, 1999 32km SSW of Ludlow, California M5.4 79 km 1 km
Jul 1, 1992 24km N of Yucca Valley, California M5.3 56 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Tornado History

83 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 14 injuries.

Date Rating Distance Path Fatalities
May 22, 2008 EF2 32 km 2.8 mi 0
Sep 7, 1982 EF2 58 km 0.5 mi 0
Nov 7, 1966 EF2 99 km 0.2 mi 0
Jun 25, 1954 EF2 69 km 0.1 mi 0
Aug 6, 2015 EF1 95 km 4.0 mi 0
Aug 4, 2008 EF1 49 km 1.1 mi 0
Feb 19, 2005 EF1 65 km 2.8 mi 0
Nov 11, 1997 EF1 89 km 0.2 mi 0
May 18, 1997 EF1 70 km 3.5 mi 0
May 18, 1997 EF1 65 km 9.0 mi 0
May 11, 1997 EF1 58 km 0.2 mi 0
Dec 22, 1996 EF1 22 km 0.1 mi 0
Jan 14, 1993 EF1 93 km 1.0 mi 0
Dec 7, 1992 EF1 91 km 0.1 mi 0
Mar 16, 1986 EF1 91 km 1.2 mi 0
Nov 9, 1982 EF1 83 km 0.2 mi 0
Jan 31, 1979 EF1 91 km 2.0 mi 0
Mar 16, 1977 EF1 98 km 10.9 mi 0
Sep 4, 1976 EF1 87 km 0.1 mi 0
Oct 22, 1974 EF1 57 km 0.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Tsunami History

2 tsunamis recorded within 500 km. Highest wave on record: 0.1 m (0 ft).

Year Location Cause Max Wave Deaths Distance
1994 WEST COAST, USA Earthquake 0.1 m 57 146 km
1855 S. CALIFORNIA Eruption + Earthquake - - 105 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Salton Buttes (156 km).

Name Type Elevation Last Eruption Distance
Salton Buttes Lava dome(s) -40 m (-131 ft) 210 156 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: BOBCAT (115,728 acres, 2020).

Year Name Acres Burned Distance
2020 BOBCAT 115,728 95 km
2003 OLD 90,180 37 km
2006 MILLARD 86,585 33 km
1999 WILLOW 63,525 36 km
2003 PARADISE 55,995 93 km
2003 GRAND PRIX 50,799 50 km
2007 POOMACHA 47,496 83 km
2006 ESPERANZA 40,566 21 km
2002 WILLIAMS 37,505 77 km
2016 BLUE CUT 36,856 59 km
2008 YELLOW 33,232 85 km
2020 APPLE 32,374 9 km
2015 LAKE 30,421 22 km
2008 FREEWAY COMPLEX 29,350 74 km
2022 FAIRVIEW 28,680 42 km
2013 MOUNTAIN 28,202 46 km
2007 SANTIAGO 27,605 74 km
1998 EDNA 27,561 16 km
2020 INDIA 24,193 83 km
1993 CALIFORNIA 23,899 45 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 54°F (12°C) 2.8 in
February 55°F (13°C) 3.0 in Wettest
March 58°F (14°C) 2.0 in
April 62°F (17°C) 0.9 in
May 66°F (19°C) 0.4 in
June 72°F (22°C) 0.1 in
July 79°F (26°C) 0.1 in
August 80°F (26°C) 0.1 in Warmest, Driest
September 76°F (24°C) 0.1 in
October 68°F (20°C) 0.5 in
November 60°F (16°C) 0.9 in
December 53°F (12°C) 2.0 in Coldest

Oak Glen has a seasonal temperature swing of 26°F / from 53°F in December to 80°F in August. Total annual precipitation is 12.9 inches, with February being the wettest month (3.0") and August the driest (0.1").

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