Weather & Climate in Sierra Madre, CA

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

Sierra Madre enjoys a temperate climate with an average annual temperature of 58°F (15°C). Winters average 47°F in January while summers reach 74°F in July. The area gets 320 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 32.2 inches. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 979 feet.

Temperature

47°F Jan (8°C) 74°F Jul (24°C)

Annual Average	58.4°F
	8% above US avg
January Average	47°F (8°C)
July Average	74°F (24°C)
Sunny Days	320 days/yr

Geography

Elevation	979 ft (298 m)
Area	3.0 sq mi (7.7 km²)
Population Density	3,736/sq mi
Coordinates	34.1688°N, 118.0502°W
Timezone	America/Los_Angeles
County	Los Angeles County County
Nearest Airport	Bob Hope (BUR) 18 miles away

Precipitation & Snow

Annual Rainfall 32.2"

15% below US avg

Wettest Month (Feb) 4.13"

Driest Month (Jun) 0.08"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very High
Risk Score	100.0 / 100
Social Vulnerability	55.4 / 100
Community Resilience	13.6 / 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

9,389 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.3.

Jun 28, 1992	The 1992 Landers, California Earthquake	M7.3	148 km	0 km
Jan 17, 1994	Northridge, California, earthquake	M6.7	45 km	18 km
Jun 28, 1992	The 1992 Big Bear, California Earthquake	M6.3	113 km	4 km
Jan 17, 1994	1km ENE of Granada Hills, California	M5.9	42 km	5 km
Jun 28, 1991	The 1991 Sierra Madre, California Earthquake	M5.8	12 km	8 km
Jul 11, 1992	12km NW of California City, California	M5.7	116 km	10 km
Oct 16, 1999	7km ENE of Running Springs, CA	M5.6	93 km	6 km
Jan 17, 1994	7km NNE of Simi Valley, California	M5.6	62 km	9 km
Jun 28, 1992	11km SSE of Big Bear Lake, California	M5.5	110 km	10 km
Feb 28, 1990	The 1990 Upland, California Earthquake	M5.5	33 km	3 km
Jun 28, 1992	0km E of Yucca Valley, CA	M5.5	150 km	8 km
Jun 28, 1992	26km NNW of Yucca Valley, CA	M5.4	143 km	4 km
Jul 1, 1992	24km N of Yucca Valley, California	M5.3	147 km	5 km
Nov 27, 1992	10km NNW of Big Bear City, California	M5.3	107 km	0 km
Mar 18, 1997	20km ENE of Barstow, California	M5.3	144 km	1 km
Jun 28, 1992	1km N of Big Bear Lake, California	M5.3	105 km	7 km
Dec 4, 1992	10km SE of Lucerne Valley, California	M5.3	108 km	1 km
Mar 20, 1994	3km WNW of Panorama City, California	M5.2	40 km	12 km
Jan 18, 1994	10km ESE of Piru, California	M5.2	64 km	11 km
Aug 17, 1992	7km SE of Big Bear Lake, California	M5.2	109 km	9 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

116 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 54 injuries.

Date	Rating	Distance	Path	Fatalities
May 22, 2008	EF2	80 km	2.8 mi	0
Mar 1, 1983	EF2	36 km	3.5 mi	0
Nov 9, 1982	EF2	37 km	1.0 mi	0
Nov 9, 1982	EF2	45 km	10.0 mi	0
Nov 7, 1966	EF2	38 km	0.1 mi	0
Nov 7, 1966	EF2	44 km	10.3 mi	0
Nov 7, 1966	EF2	59 km	0.2 mi	0
Jun 25, 1954	EF2	93 km	0.1 mi	0
Mar 22, 2023	EF1	20 km	0.5 mi	0
Jan 19, 2010	EF1	51 km	4.6 mi	0
Jan 9, 1998	EF1	45 km	1.5 mi	0
Dec 21, 1997	EF1	56 km	1.0 mi	0
Nov 11, 1997	EF1	58 km	0.2 mi	0
May 18, 1997	EF1	91 km	3.5 mi	0
May 18, 1997	EF1	93 km	9.0 mi	0
May 11, 1997	EF1	87 km	0.2 mi	0
Jan 14, 1993	EF1	33 km	1.0 mi	0
Dec 7, 1992	EF1	47 km	0.1 mi	0
Dec 7, 1992	EF1	40 km	0.1 mi	0
Mar 20, 1992	EF1	14 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	57 km
1994	WEST COAST, USA	Earthquake	0.1 m	57	45 km
1855	S. CALIFORNIA	Eruption + Earthquake	—	—	9 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	19 km
2006	DAY	159,713	98 km
2020	BOBCAT	115,728	20 km
2003	SIMI	107,756	71 km
2018	WOOLSEY	97,962	71 km
2003	OLD	90,180	71 km
2003	PIRU	63,920	82 km
1999	WILLOW	63,525	89 km
2003	GRAND PRIX	50,799	53 km
2016	SAND	41,561	37 km
2007	BUCKWEED	41,332	53 km
1993	GREEN MEADOWS	38,115	86 km
2002	WILLIAMS	37,505	25 km
2007	RANCH	37,009	73 km
2016	BLUE CUT	36,856	53 km
2013	POWERHOUSE	32,329	67 km
2020	LAKE	30,971	74 km
2008	FREEWAY COMPLEX	29,350	39 km
2007	SANTIAGO	27,605	62 km
2005	TOPANGA	24,133	60 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	47°F (8°C)	3.9 in	Coldest
February	48°F (9°C)	4.1 in	Wettest
March	50°F (10°C)	3.5 in
April	54°F (12°C)	1.6 in
May	59°F (15°C)	0.4 in
June	66°F (19°C)	0.1 in	Driest
July	74°F (24°C)	0.1 in	Warmest
August	74°F (23°C)	0.2 in
September	70°F (21°C)	0.5 in
October	62°F (17°C)	0.5 in
November	53°F (12°C)	2.6 in
December	48°F (9°C)	3.0 in

Sierra Madre has a seasonal temperature swing of 27°F / from 47°F in January to 74°F in July. Total annual precipitation is 20.5 inches, with February being the wettest month (4.1") and June the driest (0.1").

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