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Weather & Climate in Moss Beach, CA

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

Moss Beach 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 44 feet.

Temperature

52°F Jan (11°C) 61°F Jul (16°C)
Annual Average57.4°F
6% above US avg
January Average52°F (11°C)
July Average61°F (16°C)
Sunny Days317 days/yr

Geography

Elevation44 ft (13 m)
Area2.2 sq mi (5.8 km²)
Population Density1,346/sq mi
Coordinates37.5133°N, 122.4984°W
TimezoneAmerica/Los_Angeles
CountySan Mateo County County
Nearest AirportSan Francisco International (SFO)
10 miles away

Precipitation & Snow

Annual Rainfall 31.9"
16% below US avg
Snowfall 0.0"
Wettest Month (Jan) 5.94"
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

5,440 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 80 km 11 km
Apr 18, 1990 5 km NNW of Aromas, California M5.4 99 km 5 km
Aug 12, 1998 10 km SW of Ridgemark, California M5.1 125 km 9 km
Apr 18, 1990 4 km E of Interlaken, California M5.1 95 km 7 km
Jan 16, 1993 9 km E of Gilroy, California M4.9 107 km 7 km
May 14, 2002 5 km SSW of Gilroy, California M4.9 100 km 7 km
Apr 18, 1990 4 km NNW of Aromas, California M4.9 99 km 6 km
Apr 19, 1996 2 km E of Aromas, California M4.9 105 km 5 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 97 km 9 km
Sep 4, 1995 13 km SW of Middletown, California M4.8 132 km 7 km
May 12, 2006 7 km W of Cobb, California M4.7 148 km 4 km
Apr 18, 1990 4 km N of Aromas, California M4.7 100 km 4 km
May 21, 1996 8 km ESE of East Foothills, California M4.7 71 km 8 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 M4.7 150 km 1 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 47 km 8 km
Mar 24, 1991 1 km NNE of Interlaken, California M4.6 92 km 15 km
Jan 11, 2000 6 km N of Geyserville, California M4.6 144 km 6 km
Feb 18, 2004 4 km WNW of Cobb, California M4.6 149 km 3 km
Jan 12, 2014 8 km W of Cobb, California M4.5 147 km 2 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
May 5, 1998 EF2 44 km 0.6 mi 0
Jun 1, 1958 EF2 95 km 15.0 mi 0
Jan 11, 1951 EF2 37 km 5.7 mi 0
Dec 14, 2024 EF1 66 km 0.3 mi 0
Jan 23, 2010 EF1 78 km 1.6 mi 0
Mar 20, 2005 EF1 17 km 3.0 mi 0
Dec 20, 2001 EF1 88 km 0.5 mi 0
May 5, 1998 EF1 37 km 0.3 mi 0
Dec 23, 1996 EF1 90 km 6.0 mi 0
Jan 14, 1980 EF1 55 km 0.3 mi 0
Apr 1, 1965 EF1 86 km 0.1 mi 0
Apr 1, 1958 EF1 18 km 0.2 mi 0
Jan 6, 2019 EF0 75 km 0.5 mi 0
Jan 6, 2019 EF0 74 km 0.1 mi 0
Dec 22, 2012 EF0 92 km 1.1 mi 0
Apr 7, 2011 EF0 88 km 0.1 mi 0
Apr 14, 2007 EF0 98 km 0.2 mi 0
Dec 26, 2005 EF0 98 km 0.3 mi 0
Dec 5, 1998 EF0 73 km 1.0 mi 0
Dec 5, 1998 EF0 48 km 1.5 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 41 km
1989 N. CALIFORNIA Earthquake 1.0 m 62 76 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m — 18 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m — 21 km
1865 N. CALIFORNIA Eruption + Earthquake — — 63 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (164 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 164 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 88 km
2020 CZU AUG LIGHTNING 85,894 48 km
2017 NUNS 56,883 93 km
2017 ATLAS 51,664 97 km
2007 LICK 47,424 100 km
2024 CORRAL 16,138 93 km
2009 CORRAL 12,006 90 km
1995 VISION 11,931 67 km
1985 LEXINGTON 11,550 66 km
2009 LOCKHEED 8,287 54 km
1984 SITE 300 3 6,911 92 km
2005 TESLA 6,638 84 km
2003 DEL PUERTO 6,441 97 km
2006 MIDWAY 6,243 87 km
2003 DEVIL 4,975 82 km
2020 WOODWARD 4,952 64 km
2003 JUMP 4,817 87 km
2016 LOMA 4,380 75 km
2008 WILD 4,100 92 km
2008 SUMMIT 3,642 81 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 52°F (11°C) 5.9 in Wettest
February 52°F (11°C) 4.9 in
March 53°F (11°C) 4.5 in
April 55°F (13°C) 1.9 in
May 57°F (14°C) 0.6 in
June 59°F (15°C) 0.2 in
July 61°F (16°C) 0.1 in Driest
August 62°F (17°C) 0.1 in
September 63°F (17°C) 0.4 in Warmest
October 60°F (16°C) 1.7 in
November 54°F (12°C) 4.1 in
December 50°F (10°C) 4.6 in Coldest

Moss Beach has a seasonal temperature swing of 13°F / from 50°F in December to 63°F in September. Total annual precipitation is 28.9 inches, with January being the wettest month (5.9") and July the driest (0.1").

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