Weather & Climate in Alameda, CA

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

Alameda enjoys a temperate climate with an average annual temperature of 58°F (15°C). Winters average 50°F in January while summers reach 64°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 18.7 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 49. 53% of days have good air quality. The city sits at an elevation of 20 feet.

Temperature

50°F Jan (10°C) 64°F Jul (18°C)

Annual Average	58.1°F
	8% above US avg
January Average	50°F (10°C)
July Average	64°F (18°C)
Sunny Days	330 days/yr

Geography

Elevation	20 ft (6 m)
Area	10.4 sq mi (26.9 km²)
Population Density	7,392/sq mi
Coordinates	37.7419°N, 122.2599°W
Timezone	America/Los_Angeles
County	San Mateo County County
Nearest Airport	Metro Oakland International (OAK) 3 miles away

Precipitation & Snow

Annual Rainfall 18.7"

51% below US avg

Wettest Month (Jan) 4.72"

Driest Month (Jul) 0.04"

Air Quality

AQI Median	49.0
Rating	Good
Good Days %	53.0%
Unhealthy Days	1

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

5,530 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	53 km	11 km
Apr 18, 1990	5 km NNW of Aromas, California	M5.4	105 km	5 km
Aug 12, 1998	10 km SW of Ridgemark, California	M5.1	131 km	9 km
Apr 18, 1990	4 km E of Interlaken, California	M5.1	101 km	7 km
Jan 16, 1993	9 km E of Gilroy, California	M4.9	107 km	7 km
Apr 19, 1996	2 km E of Aromas, California	M4.9	111 km	5 km
May 14, 2002	5 km SSW of Gilroy, California	M4.9	104 km	7 km
Sep 3, 2000	5 km WSW of Yountville, California	M4.9	72 km	9 km
Apr 18, 1990	4 km NNW of Aromas, California	M4.9	105 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	64 km	8 km
Apr 18, 1990	4 km N of Aromas, California	M4.7	106 km	4 km
Aug 11, 1993	14 km ESE of Alum Rock, California	M4.7	70 km	9 km
Jan 2, 2025	4 km NW of Cobb, CA	M4.7	130 km	1 km
Aug 18, 1999	0 km S of Bolinas, California	M4.6	42 km	8 km
Mar 24, 1991	1 km NNE of Interlaken, California	M4.6	98 km	15 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	130 km	3 km
Jan 12, 2014	8 km W of Cobb, California	M4.5	129 km	2 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
May 5, 1998	EF2	46 km	0.6 mi	0
Jun 1, 1958	EF2	87 km	15.0 mi	0
Jan 11, 1951	EF2	43 km	5.7 mi	0
Dec 14, 2024	EF1	80 km	0.3 mi	0
Mar 18, 2011	EF1	88 km	0.1 mi	0
Jan 23, 2010	EF1	47 km	1.6 mi	0
Mar 20, 2005	EF1	17 km	3.0 mi	0
Dec 20, 2001	EF1	96 km	0.5 mi	0
Dec 5, 1998	EF1	88 km	1.5 mi	0
May 5, 1998	EF1	42 km	0.3 mi	0
Dec 23, 1996	EF1	82 km	6.0 mi	0
Feb 22, 1996	EF1	99 km	1.0 mi	0
Dec 2, 1992	EF1	92 km	7.5 mi	0
Dec 2, 1992	EF1	89 km	1.0 mi	0
Feb 27, 1983	EF1	88 km	0.8 mi	0
Jan 14, 1980	EF1	44 km	0.3 mi	0
May 31, 1967	EF1	88 km	0.1 mi	0
Apr 1, 1965	EF1	94 km	0.1 mi	0
Nov 10, 1964	EF1	100 km	1.0 mi	0
Apr 1, 1958	EF1	16 km	0.2 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	15 km
1989	N. CALIFORNIA	Earthquake	1.0 m	62	85 km
1856	N. CALIFORNIA	Eruption + Earthquake	0.6 m	—	27 km
1906	N. CALIFORNIA	Eruption + Earthquake	0.1 m	—	22 km
1865	N. CALIFORNIA	Eruption + Earthquake	—	—	68 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	72 km
2020	HENNESSEY	314,241	98 km
2020	CZU AUG LIGHTNING	85,894	66 km
2020	GLASS	68,020	94 km
2017	NUNS	56,883	71 km
2017	ATLAS	51,664	69 km
2007	LICK	47,424	93 km
2017	TUBBS	36,981	99 km
2006	CANYON	36,851	91 km
1988	MILLER	35,750	78 km
2024	CORRAL	16,138	72 km
2009	CORRAL	12,006	70 km
1995	VISION	11,931	63 km
1985	LEXINGTON	11,550	73 km
2015	WRAGG	8,455	84 km
2009	LOCKHEED	8,287	74 km
2003	BIRD	7,727	84 km
2014	MONTICELLO	6,984	90 km
1984	SITE 300 3	6,911	70 km
2005	TESLA	6,638	62 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	50°F (10°C)	4.7 in	Coldest, Wettest
February	53°F (12°C)	4.1 in
March	55°F (13°C)	3.5 in
April	58°F (14°C)	1.4 in
May	61°F (16°C)	0.5 in
June	64°F (18°C)	0.2 in
July	64°F (18°C)	0.0 in	Driest
August	66°F (19°C)	0.1 in
September	66°F (19°C)	0.3 in	Warmest
October	63°F (17°C)	1.3 in
November	56°F (13°C)	3.2 in
December	50°F (10°C)	3.3 in

Alameda has a seasonal temperature swing of 16°F / from 50°F in January to 66°F in September. Total annual precipitation is 22.5 inches, with January being the wettest month (4.7") and July the driest (0.0").

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