Weather & Climate in Colma, CA

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

Colma enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 52°F in January while summers reach 61°F in July / relatively mild seasonal variation. The area gets 317 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 31.9 inches. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 187 feet.

Temperature

52°F Jan (11°C) 61°F Jul (16°C)

Annual Average	57.4°F
	6% above US avg
January Average	52°F (11°C)
July Average	61°F (16°C)
Sunny Days	317 days/yr

Geography

Elevation	187 ft (57 m)
Area	1.9 sq mi (4.9 km²)
Population Density	762/sq mi
Coordinates	37.6767°N, 122.4528°W
Timezone	America/Los_Angeles
County	San Mateo County County
Nearest Airport	San Francisco International (SFO) 6 miles away

Precipitation & Snow

Annual Rainfall 31.9"

16% below US avg

Snowfall 0.0"

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

5,267 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	61 km	11 km
Apr 18, 1990	5 km NNW of Aromas, California	M5.4	109 km	5 km
Aug 12, 1998	10 km SW of Ridgemark, California	M5.1	135 km	9 km
Apr 18, 1990	4 km E of Interlaken, California	M5.1	105 km	7 km
Jan 16, 1993	9 km E of Gilroy, California	M4.9	114 km	7 km
Sep 3, 2000	5 km WSW of Yountville, California	M4.9	78 km	9 km
May 14, 2002	5 km SSW of Gilroy, California	M4.9	109 km	7 km
Apr 19, 1996	2 km E of Aromas, California	M4.9	115 km	5 km
Apr 18, 1990	4 km NNW of Aromas, California	M4.9	109 km	6 km
Sep 4, 1995	13 km SW of Middletown, California	M4.8	115 km	7 km
May 12, 2006	7 km W of Cobb, California	M4.7	131 km	4 km
Apr 18, 1990	4 km N of Aromas, California	M4.7	110 km	4 km
May 21, 1996	8 km ESE of East Foothills, California	M4.7	74 km	8 km
Aug 11, 1993	14 km ESE of Alum Rock, California	M4.7	79 km	9 km
Jan 2, 2025	4 km NW of Cobb, CA	M4.7	133 km	1 km
Mar 24, 1991	1 km NNE of Interlaken, California	M4.6	102 km	15 km
Aug 18, 1999	0 km S of Bolinas, California	M4.6	33 km	8 km
Jan 11, 2000	6 km N of Geyserville, California	M4.6	128 km	6 km
Feb 18, 2004	4 km WNW of Cobb, California	M4.6	132 km	3 km
Jan 12, 2014	8 km W of Cobb, California	M4.5	130 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	51 km	0.6 mi	0
Jun 1, 1958	EF2	82 km	15.0 mi	0
Jan 11, 1951	EF2	45 km	5.7 mi	0
Dec 14, 2024	EF1	79 km	0.3 mi	0
Mar 18, 2011	EF1	89 km	0.1 mi	0
Jan 23, 2010	EF1	66 km	1.6 mi	0
Mar 20, 2005	EF1	4 km	3.0 mi	0
Dec 20, 2001	EF1	99 km	0.5 mi	0
Dec 5, 1998	EF1	89 km	1.5 mi	0
May 5, 1998	EF1	44 km	0.3 mi	0
Dec 23, 1996	EF1	76 km	6.0 mi	0
Dec 2, 1992	EF1	90 km	7.5 mi	0
Dec 2, 1992	EF1	87 km	1.0 mi	0
Feb 27, 1983	EF1	89 km	0.8 mi	0
Jan 14, 1980	EF1	55 km	0.3 mi	0
Apr 1, 1965	EF1	97 km	0.1 mi	0
Nov 10, 1964	EF1	100 km	1.0 mi	0
Apr 1, 1958	EF1	11 km	0.2 mi	0
Jan 6, 2019	EF0	88 km	0.1 mi	0
Jan 6, 2019	EF0	89 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	31 km
1989	N. CALIFORNIA	Earthquake	1.0 m	62	87 km
1856	N. CALIFORNIA	Eruption + Earthquake	0.6 m	—	24 km
1906	N. CALIFORNIA	Eruption + Earthquake	0.1 m	—	5 km
1865	N. CALIFORNIA	Eruption + Earthquake	—	—	72 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (146 km).

Name	Type	Elevation	Last Eruption	Distance
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	146 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	86 km
2020	CZU AUG LIGHTNING	85,894	63 km
2020	GLASS	68,020	98 km
2017	NUNS	56,883	75 km
2017	ATLAS	51,664	79 km
1988	MILLER	35,750	90 km
2024	CORRAL	16,138	88 km
2009	CORRAL	12,006	86 km
1995	VISION	11,931	55 km
1985	LEXINGTON	11,550	76 km
2015	WRAGG	8,455	96 km
2009	LOCKHEED	8,287	69 km
2003	BIRD	7,727	99 km
1984	SITE 300 3	6,911	86 km
2005	TESLA	6,638	78 km
2003	DEL PUERTO	6,441	97 km
2006	MIDWAY	6,243	81 km
2003	DEVIL	4,975	80 km
2020	WOODWARD	4,952	51 km
2000	BERRYESSA	4,826	97 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	61°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

Colma 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").

View full profile of Colma, CA →