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Weather & Climate in Hacienda Heights, CA

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

Hacienda Heights enjoys a temperate climate with an average annual temperature of 66°F (19°C). Winters average 58°F in January while summers reach 75°F in July / relatively mild seasonal variation. The area gets 330 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 11.9 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 423 feet.

Temperature

58°F Jan (14°C) 75°F Jul (24°C)
Annual Average66.2°F
23% above US avg
January Average58°F (14°C)
July Average75°F (24°C)
Sunny Days330 days/yr

Geography

Elevation423 ft (129 m)
Area11.2 sq mi (29.0 km²)
Population Density4,929/sq mi
Coordinates33.9959°N, 117.9730°W
TimezoneAmerica/Los_Angeles
CountyOrange County County
Nearest AirportOntario International (ONT)
22 miles away

Precipitation & Snow

Annual Rainfall 11.9"
69% below US avg
Wettest Month (Feb) 3.46"
Driest Month (Jul) 0.04"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskVery High
Risk Score99.8 / 100
Social Vulnerability24.9 / 100
Community Resilience16.3 / 100

Hazard Breakdown

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

Earthquake History

9,941 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.3.

Jun 28, 1992 The 1992 Landers, California Earthquake M7.3 143 km 0 km
Jan 17, 1994 Northridge, California, earthquake M6.7 57 km 18 km
Jun 28, 1992 The 1992 Big Bear, California Earthquake M6.3 108 km 4 km
Jan 17, 1994 1km ENE of Granada Hills, California M5.9 57 km 5 km
Jun 28, 1991 The 1991 Sierra Madre, California Earthquake M5.8 31 km 8 km
Jun 28, 1992 3km NE of Yucca Valley, California M5.8 145 km -1 km
Jun 29, 1992 3km ESE of Yucca Valley, California M5.7 145 km 10 km
Jul 11, 1992 12km NW of California City, California M5.7 135 km 10 km
Oct 16, 1999 7km ENE of Running Springs, CA M5.6 90 km 6 km
Jan 17, 1994 7km NNE of Simi Valley, California M5.6 76 km 9 km
Jun 28, 1992 11km SSE of Big Bear Lake, California M5.5 105 km 10 km
Feb 28, 1990 The 1990 Upland, California Earthquake M5.5 30 km 3 km
Jun 28, 1992 0km E of Yucca Valley, CA M5.5 143 km 8 km
Jun 28, 1992 26km NNW of Yucca Valley, CA M5.4 140 km 4 km
Jul 1, 1992 24km N of Yucca Valley, California M5.3 144 km 5 km
Nov 27, 1992 10km NNW of Big Bear City, California M5.3 106 km 0 km
Jun 28, 1992 1km N of Big Bear Lake, California M5.3 102 km 7 km
Dec 4, 1992 10km SE of Lucerne Valley, California M5.3 107 km 1 km
Sep 15, 1992 9km SE of Yucca Valley, California M5.3 149 km 7 km
Mar 20, 1994 3km WNW of Panorama City, California M5.2 53 km 12 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

117 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 55 injuries.

Date Rating Distance Path Fatalities
May 22, 2008 EF2 68 km 2.8 mi 0
Mar 1, 1983 EF2 37 km 3.5 mi 0
Nov 9, 1982 EF2 32 km 10.0 mi 0
Nov 9, 1982 EF2 49 km 1.0 mi 0
Nov 7, 1966 EF2 37 km 10.3 mi 0
Nov 7, 1966 EF2 32 km 0.1 mi 0
Nov 7, 1966 EF2 39 km 0.2 mi 0
Mar 22, 2023 EF1 14 km 0.5 mi 0
Jan 19, 2010 EF1 34 km 4.6 mi 0
Feb 19, 2005 EF1 94 km 2.8 mi 0
Jan 9, 1998 EF1 30 km 1.5 mi 0
Dec 21, 1997 EF1 36 km 1.0 mi 0
Nov 11, 1997 EF1 38 km 0.2 mi 0
May 18, 1997 EF1 98 km 3.5 mi 0
May 18, 1997 EF1 99 km 9.0 mi 0
May 11, 1997 EF1 92 km 0.2 mi 0
Jan 14, 1993 EF1 13 km 1.0 mi 0
Dec 7, 1992 EF1 28 km 0.1 mi 0
Dec 7, 1992 EF1 19 km 0.1 mi 0
Mar 20, 1992 EF1 22 km 0.2 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

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

Year Location Cause Max Wave Deaths Distance
1930 S. CALIFORNIA Eruption + Earthquake 3.1 m 1 62 km
1994 WEST COAST, USA Earthquake 0.1 m 57 57 km
1855 S. CALIFORNIA Eruption + Earthquake — — 17 km
Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: STATION (165,368 acres, 2009).

Year Name Acres Burned Distance
2009 STATION 165,368 40 km
2020 BOBCAT 115,728 37 km
2003 SIMI 107,756 84 km
2018 WOOLSEY 97,962 80 km
2003 OLD 90,180 69 km
2003 PIRU 63,920 98 km
1999 WILLOW 63,525 89 km
2003 GRAND PRIX 50,799 51 km
2016 SAND 41,561 56 km
2007 BUCKWEED 41,332 72 km
1993 GREEN MEADOWS 38,115 93 km
2002 WILLIAMS 37,505 29 km
2007 RANCH 37,009 90 km
2016 BLUE CUT 36,856 56 km
2008 YELLOW 33,232 83 km
2013 POWERHOUSE 32,329 87 km
2020 LAKE 30,971 94 km
2008 FREEWAY COMPLEX 29,350 22 km
2007 SANTIAGO 27,605 42 km
1998 EDNA 27,561 91 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 58°F (14°C) 3.4 in
February 58°F (14°C) 3.5 in Wettest
March 59°F (15°C) 3.0 in
April 62°F (17°C) 0.9 in
May 65°F (18°C) 0.2 in
June 70°F (21°C) 0.1 in
July 75°F (24°C) 0.0 in Warmest, Driest
August 75°F (24°C) 0.1 in
September 73°F (23°C) 0.3 in
October 68°F (20°C) 0.5 in
November 61°F (16°C) 1.6 in
December 56°F (13°C) 2.1 in Coldest

Hacienda Heights has a seasonal temperature swing of 19°F / from 56°F in December to 75°F in July. Total annual precipitation is 15.7 inches, with February being the wettest month (3.5") and July the driest (0.0").

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