Weather & Climate in Broadmoor, CA

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

Broadmoor enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 52°F in January while summers reach 60°F in July / relatively mild seasonal variation. The area gets 323 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 22.9 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 185 feet.

Temperature

52°F Jan (11°C) 60°F Jul (16°C)

Annual Average	57.7°F
	7% above US avg
January Average	52°F (11°C)
July Average	60°F (16°C)
Sunny Days	323 days/yr

Geography

Elevation	185 ft (56 m)
Area	0.5 sq mi (1.2 km²)
Population Density	10,388/sq mi
Coordinates	37.6915°N, 122.4813°W
Timezone	America/Los_Angeles
County	San Mateo County County
Nearest Airport	San Francisco International (SFO) 8 miles away

Precipitation & Snow

Annual Rainfall 22.9"

40% below US avg

Wettest Month (Jan) 6.38"

Driest Month (Jul) 0.08"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	99.2 / 100
Social Vulnerability	20.5 / 100
Community Resilience	97.6 / 100

Hazard Breakdown

Tornado	Relatively Low
Earthquake	Relatively High
Wildfire	Relatively Moderate
Flood	Relatively High
Hail	Very Low
Strong Wind	Relatively Low
Heat Wave	Relatively Moderate
Winter Weather	Very Low
Lightning	Relatively Moderate
Drought	Relatively High
Cold Wave	No Rating
Landslide	Relatively High
Coastal Flood	Relatively High
Tsunami	Relatively Moderate

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

5,100 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.

Aug 24, 2014	The 2014 South Napa, California Earthquake	M6.0	60 km	11 km
Apr 18, 1990	5 km NNW of Aromas, California	M5.4	112 km	5 km
Apr 18, 1990	4 km E of Interlaken, California	M5.1	108 km	7 km
Aug 12, 1998	10 km SW of Ridgemark, California	M5.1	138 km	9 km
Jan 16, 1993	9 km E of Gilroy, California	M4.9	117 km	7 km
Sep 3, 2000	5 km WSW of Yountville, California	M4.9	77 km	9 km
Apr 19, 1996	2 km E of Aromas, California	M4.9	118 km	5 km
May 14, 2002	5 km SSW of Gilroy, California	M4.9	112 km	7 km
Apr 18, 1990	4 km NNW of Aromas, California	M4.9	112 km	6 km
Sep 4, 1995	13 km SW of Middletown, California	M4.8	113 km	7 km
May 12, 2006	7 km W of Cobb, California	M4.7	129 km	4 km
May 21, 1996	8 km ESE of East Foothills, California	M4.7	76 km	8 km
Apr 18, 1990	4 km N of Aromas, California	M4.7	113 km	4 km
Aug 11, 1993	14 km ESE of Alum Rock, California	M4.7	82 km	9 km
Jan 2, 2025	4 km NW of Cobb, CA	M4.7	131 km	1 km
Aug 18, 1999	0 km S of Bolinas, California	M4.6	30 km	8 km
Mar 24, 1991	1 km NNE of Interlaken, California	M4.6	105 km	15 km
Jan 11, 2000	6 km N of Geyserville, California	M4.6	126 km	6 km
Feb 18, 2004	4 km WNW of Cobb, California	M4.6	130 km	3 km
Jan 12, 2014	8 km W of Cobb, California	M4.5	128 km	2 km

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

Tornado History

41 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 9 injuries.

Date	Rating	Distance	Path	Fatalities
May 5, 1998	EF2	54 km	0.6 mi	0
Jun 1, 1958	EF2	79 km	15.0 mi	0
Jan 11, 1951	EF2	48 km	5.7 mi	0
Dec 14, 2024	EF1	82 km	0.3 mi	0
Mar 18, 2011	EF1	87 km	0.1 mi	0
Jan 23, 2010	EF1	68 km	1.6 mi	0
Mar 20, 2005	EF1	7 km	3.0 mi	0
Dec 5, 1998	EF1	87 km	1.5 mi	0
May 5, 1998	EF1	47 km	0.3 mi	0
Dec 23, 1996	EF1	74 km	6.0 mi	0
Feb 22, 1996	EF1	98 km	1.0 mi	0
Dec 2, 1992	EF1	87 km	7.5 mi	0
Dec 2, 1992	EF1	85 km	1.0 mi	0
Dec 2, 1992	EF1	100 km	3.0 mi	0
Feb 27, 1983	EF1	87 km	0.8 mi	0
Jan 14, 1980	EF1	58 km	0.3 mi	0
Apr 1, 1965	EF1	99 km	0.1 mi	0
Nov 10, 1964	EF1	97 km	1.0 mi	0
Apr 1, 1958	EF1	14 km	0.2 mi	0
Jan 6, 2019	EF0	91 km	0.5 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

5 tsunamis recorded within 500 km. Highest wave on record: 4.5 m (15 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1868	N. CALIFORNIA	Eruption + Earthquake	4.5 m	30	34 km
1989	N. CALIFORNIA	Earthquake	1.0 m	62	90 km
1856	N. CALIFORNIA	Eruption + Earthquake	0.6 m	—	27 km
1906	N. CALIFORNIA	Eruption + Earthquake	0.1 m	—	2 km
1865	N. CALIFORNIA	Eruption + Earthquake	—	—	75 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (144 km).

Name	Type	Elevation	Last Eruption	Distance
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	144 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: SCU LIGHTNING COMPLEX (405,787 acres, 2020).

Year	Name	Acres Burned	Distance
2020	SCU LIGHTNING COMPLEX	405,787	89 km
2020	CZU AUG LIGHTNING	85,894	65 km
2020	GLASS	68,020	96 km
2017	NUNS	56,883	73 km
2017	ATLAS	51,664	78 km
2017	TUBBS	36,981	99 km
1988	MILLER	35,750	89 km
2024	CORRAL	16,138	90 km
2009	CORRAL	12,006	88 km
1995	VISION	11,931	52 km
1985	LEXINGTON	11,550	79 km
2015	WRAGG	8,455	95 km
2009	LOCKHEED	8,287	72 km
1984	SITE 300 3	6,911	89 km
2005	TESLA	6,638	81 km
2003	DEL PUERTO	6,441	99 km
2006	MIDWAY	6,243	84 km
2003	DEVIL	4,975	83 km
2020	WOODWARD	4,952	48 km
2000	BERRYESSA	4,826	95 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	52°F (11°C)	6.4 in	Wettest
February	53°F (12°C)	5.4 in
March	54°F (12°C)	4.8 in
April	56°F (13°C)	1.9 in
May	58°F (15°C)	0.7 in
June	61°F (16°C)	0.2 in
July	60°F (16°C)	0.1 in	Driest
August	63°F (17°C)	0.1 in
September	64°F (18°C)	0.4 in	Warmest
October	61°F (16°C)	1.8 in
November	56°F (13°C)	4.3 in
December	51°F (10°C)	4.9 in	Coldest

Broadmoor has a seasonal temperature swing of 13°F / from 51°F in December to 64°F in September. Total annual precipitation is 30.8 inches, with January being the wettest month (6.4") and July the driest (0.1").

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