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Weather & Climate in Brisbane, CA

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

Brisbane enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 51°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 19.6 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 17 feet.

Temperature

51°F Jan (11°C) 64°F Jul (18°C)
Annual Average58.7°F
9% above US avg
January Average51°F (11°C)
July Average64°F (18°C)
Sunny Days330 days/yr

Geography

Elevation17 ft (5 m)
Area20.1 sq mi (52.0 km²)
Population Density1,578/sq mi
Coordinates37.6758°N, 122.3833°W
TimezoneAmerica/Los_Angeles
CountySan Mateo County County
Nearest AirportSan Francisco International (SFO)
4 miles away

Precipitation & Snow

Annual Rainfall 19.6"
48% below US avg
Wettest Month (Jan) 6.38"
Driest Month (Jul) 0.08"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score99.2 / 100
Social Vulnerability20.5 / 100
Community Resilience97.6 / 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

5,445 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 M5.4 105 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 M4.9 109 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 M4.9 105 km 7 km
Apr 18, 1990 4 km NNW of Aromas, California M4.9 105 km 6 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 78 km 9 km
Sep 4, 1995 13 km SW of Middletown, California M4.8 116 km 7 km
May 12, 2006 7 km W of Cobb, California M4.7 132 km 4 km
May 21, 1996 8 km ESE of East Foothills, California M4.7 68 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 74 km 9 km
Jan 2, 2025 4 km NW of Cobb, CA M4.7 134 km 1 km
Mar 24, 1991 1 km NNE of Interlaken, California M4.6 98 km 15 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 37 km 8 km
Jan 11, 2000 6 km N of Geyserville, California M4.6 130 km 6 km
Feb 18, 2004 4 km WNW of Cobb, California M4.6 133 km 3 km
Jan 12, 2014 8 km W of Cobb, California M4.5 132 km 2 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

48 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 85 km 15.0 mi 0
Jan 11, 1951 EF2 41 km 5.7 mi 0
Dec 14, 2024 EF1 76 km 0.3 mi 0
Mar 18, 2011 EF1 91 km 0.1 mi 0
Jan 23, 2010 EF1 60 km 1.6 mi 0
Mar 20, 2005 EF1 4 km 3.0 mi 0
Dec 20, 2001 EF1 95 km 0.5 mi 0
Dec 5, 1998 EF1 90 km 1.5 mi 0
May 5, 1998 EF1 40 km 0.3 mi 0
Dec 23, 1996 EF1 80 km 6.0 mi 0
Dec 2, 1992 EF1 90 km 1.0 mi 0
Dec 2, 1992 EF1 92 km 7.5 mi 0
Feb 27, 1983 EF1 90 km 0.8 mi 0
Jan 14, 1980 EF1 49 km 0.3 mi 0
Apr 1, 1965 EF1 93 km 0.1 mi 0
Apr 1, 1958 EF1 7 km 0.2 mi 0
Jan 6, 2019 EF0 85 km 0.1 mi 0
Jan 6, 2019 EF0 86 km 0.5 mi 0
Apr 27, 2016 EF0 96 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 25 km
1989 N. CALIFORNIA Earthquake 1.0 m 62 84 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m — 21 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m — 11 km
1865 N. CALIFORNIA Eruption + Earthquake — — 68 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (148 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 148 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 80 km
2020 CZU AUG LIGHTNING 85,894 61 km
2020 GLASS 68,020 99 km
2017 NUNS 56,883 76 km
2017 ATLAS 51,664 78 km
2007 LICK 47,424 98 km
2006 CANYON 36,851 98 km
1988 MILLER 35,750 88 km
2024 CORRAL 16,138 82 km
2009 CORRAL 12,006 79 km
1995 VISION 11,931 59 km
1985 LEXINGTON 11,550 72 km
2015 WRAGG 8,455 94 km
2009 LOCKHEED 8,287 68 km
2003 BIRD 7,727 93 km
2014 MONTICELLO 6,984 100 km
1984 SITE 300 3 6,911 80 km
2005 TESLA 6,638 72 km
2003 DEL PUERTO 6,441 91 km
2016 COLD 6,289 99 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 51°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 64°F (18°C) 0.1 in Warmest, Driest
August 63°F (17°C) 0.1 in
September 64°F (18°C) 0.4 in
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

Brisbane has a seasonal temperature swing of 13°F / from 51°F in December to 64°F in July. 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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