Weather & Climate in Hermosa Beach, CA

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

Hermosa Beach enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 58°F in January while summers reach 70°F in July / relatively mild seasonal variation. Annual precipitation totals 12.2 inches (drier than the 38-inch national average). Air quality is rated Moderate with a median AQI of 80 / residents may notice occasional air quality concerns. 10% of days have good air quality. The city sits at an elevation of 19 feet.

Temperature

58°F Jan (14°C) 70°F Jul (21°C)
Annual Average63.6°F
18% above US avg
January Average58°F (14°C)
July Average70°F (21°C)

Geography

Elevation19 ft (6 m)
Area1.4 sq mi (3.7 km²)
Population Density13,460/sq mi
Coordinates33.8698°N, 118.4053°W
TimezoneAmerica/Los_Angeles
CountyLos Angeles County County
Nearest AirportLos Angeles International (LAX)
5 miles away

Precipitation & Snow

Annual Rainfall 12.2"
68% below US avg
Snowfall 0.0"
Wettest Month (Feb) 2.99"
Driest Month (Jul) 0.04"

Air Quality

AQI Median80.0
RatingModerate
Good Days %10.4%
Unhealthy Days133

Natural Hazard Risk

Overall RiskVery High
Risk Score100.0 / 100
Social Vulnerability55.4 / 100
Community Resilience13.6 / 100

Hazard Breakdown

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

Earthquake History

5,008 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.7.

Jan 17, 1994 Northridge, California, earthquake M6.7 40 km 18 km
Jan 17, 1994 1km ENE of Granada Hills, California M5.9 46 km 5 km
Jun 28, 1991 The 1991 Sierra Madre, California Earthquake M5.8 59 km 8 km
Oct 16, 1999 7km ENE of Running Springs, CA M5.6 132 km 6 km
Jan 17, 1994 7km NNE of Simi Valley, California M5.6 57 km 9 km
Jun 28, 1992 11km SSE of Big Bear Lake, California M5.5 147 km 10 km
Feb 28, 1990 The 1990 Upland, California Earthquake M5.5 72 km 3 km
Apr 5, 2018 31km SW of Santa Cruz Is. (E end), CA M5.3 123 km 10 km
Nov 27, 1992 10km NNW of Big Bear City, California M5.3 148 km 0 km
Jun 28, 1992 1km N of Big Bear Lake, California M5.3 144 km 7 km
Dec 4, 1992 10km SE of Lucerne Valley, California M5.3 149 km 1 km
Mar 20, 1994 3km WNW of Panorama City, California M5.2 41 km 12 km
Jan 18, 1994 10km ESE of Piru, California M5.2 63 km 11 km
Aug 17, 1992 7km SE of Big Bear Lake, California M5.2 147 km 9 km
Jan 17, 1994 9km N of Chatsworth, California M5.2 56 km 5 km
Mar 29, 2014 2km NW of Brea, CA M5.1 46 km 5 km
Aug 20, 2023 7 km SE of Ojai, CA M5.1 94 km 5 km
Apr 26, 1997 12km ESE of Piru, California M5.1 61 km 16 km
Jan 19, 1994 10km SSW of Valencia, California M5.1 60 km 11 km
Jan 19, 1994 8km ESE of Piru, California M5.1 63 km 14 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Tornado History

91 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 53 injuries.

Date Rating Distance Path Fatalities
Mar 1, 1983 EF2 13 km 3.5 mi 0
Nov 9, 1982 EF2 21 km 10.0 mi 0
Nov 9, 1982 EF2 35 km 1.0 mi 0
Nov 7, 1966 EF2 7 km 10.3 mi 0
Nov 7, 1966 EF2 10 km 0.1 mi 0
Nov 7, 1966 EF2 51 km 0.2 mi 0
Mar 22, 2023 EF1 30 km 0.5 mi 0
Jan 19, 2010 EF1 31 km 4.6 mi 0
Jan 9, 1998 EF1 24 km 1.5 mi 0
Dec 21, 1997 EF1 44 km 1.0 mi 0
Nov 11, 1997 EF1 58 km 0.2 mi 0
Jan 14, 1993 EF1 42 km 1.0 mi 0
Dec 7, 1992 EF1 40 km 0.1 mi 0
Dec 7, 1992 EF1 45 km 0.1 mi 0
Mar 20, 1992 EF1 33 km 0.2 mi 0
Mar 27, 1991 EF1 44 km 3.0 mi 0
Mar 16, 1986 EF1 45 km 1.2 mi 0
Oct 1, 1983 EF1 8 km 0.3 mi 0
Nov 9, 1982 EF1 31 km 0.2 mi 0
Nov 9, 1982 EF1 75 km 0.2 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Tsunami History

4 tsunamis recorded within 500 km. Highest wave on record: 3.4 m (11 ft).

Year Location Cause Max Wave Deaths Distance
1812 S. CALIFORNIA Eruption + Earthquake 3.4 m 1 143 km
1930 S. CALIFORNIA Eruption + Earthquake 3.1 m 1 28 km
1994 WEST COAST, USA Earthquake 0.1 m 57 40 km
1855 S. CALIFORNIA Eruption + Earthquake - - 38 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 57 km
2006 DAY 159,713 98 km
2020 BOBCAT 115,728 67 km
2003 SIMI 107,756 63 km
2018 WOOLSEY 97,962 48 km
2003 PIRU 63,920 80 km
2003 GRAND PRIX 50,799 93 km
1985 FERNDALE 46,724 91 km
2016 SAND 41,561 58 km
2007 BUCKWEED 41,332 72 km
1993 GREEN MEADOWS 38,115 59 km
2002 WILLIAMS 37,505 68 km
2007 RANCH 37,009 78 km
2016 BLUE CUT 36,856 97 km
2013 POWERHOUSE 32,329 89 km
2020 LAKE 30,971 92 km
2008 FREEWAY COMPLEX 29,350 61 km
2007 SANTIAGO 27,605 71 km
1993 STECKEL 26,202 89 km
2005 TOPANGA 24,133 47 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 58°F (14°C) 2.9 in
February 58°F (14°C) 3.0 in Wettest
March 59°F (15°C) 1.7 in
April 61°F (16°C) 0.6 in
May 64°F (18°C) 0.3 in
June 66°F (19°C) 0.1 in
July 70°F (21°C) 0.0 in
August 71°F (22°C) 0.0 in Warmest, Driest
September 70°F (21°C) 0.1 in
October 67°F (20°C) 0.5 in
November 62°F (17°C) 0.8 in
December 58°F (14°C) 2.2 in Coldest

Hermosa Beach has a seasonal temperature swing of 13°F / from 58°F in December to 71°F in August. Total annual precipitation is 12.2 inches, with February being the wettest month (3.0") and August the driest (0.0").

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