Weather & Climate in Contra Costa Centre, CA

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

Contra Costa Centre enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 50°F in January while summers reach 73°F in July. 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 17.7 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 94 feet.

Temperature

50°F Jan (10°C) 73°F Jul (23°C)

Annual Average	62.4°F
	16% above US avg
January Average	50°F (10°C)
July Average	73°F (23°C)
Sunny Days	330 days/yr

Geography

Elevation	94 ft (29 m)
Area	0.6 sq mi (1.7 km²)
Population Density	11,136/sq mi
Coordinates	37.9260°N, 122.0540°W
Timezone	America/Los_Angeles
County	San Mateo County County
Nearest Airport	Metro Oakland International (OAK) 17 miles away

Precipitation & Snow

Annual Rainfall 17.7"

53% below US avg

Snowfall 0.0"

Wettest Month (Jan) 4.65"

Driest Month (Jul) 0.04"

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

5,113 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	39 km	11 km
Apr 18, 1990	5 km NNW of Aromas, California	M5.4	116 km	5 km
Apr 18, 1990	4 km E of Interlaken, California	M5.1	112 km	7 km
Aug 12, 1998	10 km SW of Ridgemark, California	M5.1	140 km	9 km
Jan 16, 1993	9 km E of Gilroy, California	M4.9	114 km	7 km
Apr 18, 1990	4 km NNW of Aromas, California	M4.9	116 km	6 km
Sep 3, 2000	5 km WSW of Yountville, California	M4.9	59 km	9 km
May 14, 2002	5 km SSW of Gilroy, California	M4.9	114 km	7 km
Apr 19, 1996	2 km E of Aromas, California	M4.9	122 km	5 km
Sep 4, 1995	13 km SW of Middletown, California	M4.8	104 km	7 km
May 12, 2006	7 km W of Cobb, California	M4.7	119 km	4 km
May 21, 1996	8 km ESE of East Foothills, California	M4.7	69 km	8 km
Apr 18, 1990	4 km N of Aromas, California	M4.7	117 km	4 km
Aug 11, 1993	14 km ESE of Alum Rock, California	M4.7	76 km	9 km
Jan 2, 2025	4 km NW of Cobb, CA	M4.7	119 km	1 km
Aug 18, 1999	0 km S of Bolinas, California	M4.6	56 km	8 km
Mar 24, 1991	1 km NNE of Interlaken, California	M4.6	111 km	15 km
Jan 11, 2000	6 km N of Geyserville, California	M4.6	120 km	6 km
Feb 18, 2004	4 km WNW of Cobb, California	M4.6	119 km	3 km
Jan 12, 2014	8 km W of Cobb, California	M4.5	119 km	2 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
May 5, 1998	EF2	62 km	0.6 mi	0
Jun 1, 1958	EF2	90 km	15.0 mi	0
Apr 27, 1953	EF2	98 km	0.1 mi	0
Jan 11, 1951	EF2	62 km	5.7 mi	0
Dec 14, 2024	EF1	98 km	0.3 mi	0
Mar 18, 2011	EF1	82 km	0.1 mi	0
Jan 23, 2010	EF1	25 km	1.6 mi	0
Apr 14, 2006	EF1	98 km	0.5 mi	0
Mar 20, 2005	EF1	45 km	3.0 mi	0
Dec 5, 1998	EF1	81 km	1.5 mi	0
May 5, 1998	EF1	61 km	0.3 mi	0
Dec 23, 1996	EF1	85 km	6.0 mi	0
Feb 22, 1996	EF1	91 km	1.0 mi	0
Dec 2, 1992	EF1	86 km	1.0 mi	0
Dec 2, 1992	EF1	91 km	7.5 mi	0
Dec 2, 1992	EF1	96 km	3.0 mi	0
Apr 19, 1988	EF1	84 km	0.2 mi	0
Feb 27, 1983	EF1	81 km	0.8 mi	0
Jan 14, 1980	EF1	52 km	0.3 mi	0
May 31, 1967	EF1	66 km	0.1 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	25 km
1989	N. CALIFORNIA	Earthquake	1.0 m	62	100 km
1856	N. CALIFORNIA	Eruption + Earthquake	0.6 m	—	52 km
1906	N. CALIFORNIA	Eruption + Earthquake	0.1 m	—	47 km
1865	N. CALIFORNIA	Eruption + Earthquake	—	—	82 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (132 km).

Name	Type	Elevation	Last Eruption	Distance
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	132 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	69 km
2020	HENNESSEY	314,241	80 km
2018	COUNTY	92,450	85 km
2020	CZU AUG LIGHTNING	85,894	88 km
2020	GLASS	68,020	82 km
2017	NUNS	56,883	61 km
2017	ATLAS	51,664	51 km
2007	LICK	47,424	96 km
2004	RUMSEY	39,335	94 km
2017	TUBBS	36,981	90 km
2006	CANYON	36,851	89 km
1988	MILLER	35,750	56 km
2024	CORRAL	16,138	61 km
2006	ZAM ASSIST	14,404	93 km
2009	CORRAL	12,006	62 km
1995	VISION	11,931	72 km
1985	LEXINGTON	11,550	88 km
2015	WRAGG	8,455	62 km
2009	LOCKHEED	8,287	95 km
2003	BIRD	7,727	76 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	50°F (10°C)	4.7 in	Wettest
February	51°F (11°C)	3.9 in
March	54°F (12°C)	3.2 in
April	57°F (14°C)	1.3 in
May	62°F (17°C)	0.5 in
June	67°F (19°C)	0.1 in
July	73°F (23°C)	0.0 in	Warmest, Driest
August	70°F (21°C)	0.1 in
September	68°F (20°C)	0.3 in
October	63°F (17°C)	1.2 in
November	54°F (12°C)	3.2 in
December	48°F (9°C)	3.3 in	Coldest

Contra Costa Centre has a seasonal temperature swing of 26°F / from 48°F in December to 73°F in July. Total annual precipitation is 21.8 inches, with January being the wettest month (4.7") and July the driest (0.0").

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