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Weather & Climate in Chula Vista, CA

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

Chula Vista enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 53°F in January while summers reach 71°F in July / relatively mild seasonal variation. The area gets 324 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 25.9 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 443 feet.

Temperature

53°F Jan (12°C) 71°F Jul (22°C)
Annual Average61.7°F
14% above US avg
January Average53°F (12°C)
July Average71°F (22°C)
Sunny Days324 days/yr

Geography

Elevation443 ft (135 m)
Area52.1 sq mi (134.9 km²)
Population Density5,540/sq mi
Coordinates32.6277°N, 117.0152°W
TimezoneAmerica/Los_Angeles
CountySan Diego County County
Nearest AirportSan Diego International (SAN)
13 miles away

Precipitation & Snow

Annual Rainfall 25.9"
32% below US avg
Snowfall 0.0"
Wettest Month (Mar) 2.17"
Driest Month (Jul) 0.04"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskVery High
Risk Score99.7 / 100
Social Vulnerability24.8 / 100
Community Resilience8.3 / 100

Hazard Breakdown

Tornado Relatively Low
Hurricane Very Low
Earthquake Relatively High
Wildfire Very High
Flood Very High
Hail Relatively Moderate
Strong Wind Relatively Moderate
Heat Wave Relatively High
Winter Weather Relatively Low
Lightning Relatively Moderate
Drought Relatively Low
Cold Wave Very Low
Landslide Relatively High
Coastal Flood Relatively Moderate
Tsunami Relatively Low
Volcano Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

7,009 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.7.

Jun 15, 2010 8km ESE of Ocotillo, CA M5.7 104 km 9 km
Jul 7, 2010 20km NNW of Borrego Springs, CA M5.4 101 km 12 km
Aug 26, 2012 4km NNW of Brawley, CA M5.4 145 km 8 km
Dec 3, 1991 71km E of Maneadero, B.C., MX M5.3 148 km 6 km
Aug 26, 2012 5km NNW of Brawley, CA M5.3 143 km 8 km
Mar 23, 1994 35km E of Maneadero, B.C., MX M5.3 126 km 5 km
Apr 4, 2010 15km SSW of Progreso, B.C., MX M5.3 131 km 10 km
Jun 5, 2021 11km W of Calipatria, CA M5.3 141 km 6 km
Apr 14, 2025 5 km S of Julian, CA M5.2 60 km 14 km
Jun 12, 2005 10km ESE of Anza, CA M5.2 109 km 13 km
Jun 10, 2016 20km NNW of Borrego Springs, CA M5.2 104 km 12 km
Oct 31, 2001 16km ESE of Anza, CA M5.0 109 km 14 km
Jun 15, 2004 67km SE of San Clemente Is. (SE tip), CA M5.0 90 km 10 km
Apr 5, 2010 20km ESE of Ocotillo, CA M5.0 113 km 1 km
Apr 5, 2010 19km ESE of Ocotillo, CA M4.9 113 km 14 km
Aug 27, 2012 5km NNE of Brawley, CA M4.9 146 km 4 km
May 22, 2010 17km WNW of Progreso, B.C., MX M4.9 118 km 8 km
Aug 26, 2012 5km NW of Brawley, CA M4.9 143 km 4 km
Jul 26, 1997 16km N of Borrego Springs, California M4.9 106 km 11 km
Apr 4, 2020 17km ESE of Anza, CA M4.9 107 km 10 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Tornado History

27 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 4 injuries.

Date Rating Distance Path Fatalities
Feb 19, 2005 EF1 96 km 2.8 mi 0
Nov 10, 2000 EF1 36 km 0.4 mi 0
Jan 29, 1998 EF1 54 km 0.5 mi 0
Mar 27, 1991 EF1 60 km 0.2 mi 0
Mar 19, 1991 EF1 16 km 1.0 mi 0
Feb 20, 1980 EF1 24 km 0.1 mi 0
Dec 18, 1978 EF1 72 km 0.8 mi 0
Oct 8, 1961 EF1 68 km 0.1 mi 0
Apr 13, 1956 EF1 6 km 0.1 mi 0
Sep 22, 2007 EF0 51 km 0.1 mi 0
Mar 11, 2006 EF0 53 km 2.0 mi 0
Mar 10, 2006 EF0 54 km 0.2 mi 0
Feb 23, 2005 EF0 6 km 0.1 mi 0
Feb 19, 2005 EF0 89 km 2.2 mi 0
Feb 19, 2005 EF0 84 km 2.5 mi 0
Oct 17, 2004 EF0 72 km 0.2 mi 0
Jul 12, 1999 EF0 71 km 0.1 mi 0
Feb 8, 1998 EF0 51 km 3.0 mi 0
May 20, 1997 EF0 98 km 0.1 mi 0
Dec 7, 1992 EF0 68 km 0.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Tsunami History

1 tsunami recorded within 500 km. Highest wave on record: 1.2 m (4 ft).

Year Location Cause Max Wave Deaths Distance
1862 S. CALIFORNIA Eruption + Earthquake 1.2 m - 19 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Salton Buttes (145 km).

Name Type Elevation Last Eruption Distance
Salton Buttes Lava dome(s) -40 m (-131 ft) 210 145 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: CEDAR (268,362 acres, 2003).

Year Name Acres Burned Distance
2003 CEDAR 268,362 42 km
2007 WITCH 167,551 55 km
2007 HARRIS 90,443 23 km
2002 PINES 65,407 71 km
2003 PARADISE 55,995 65 km
2007 POOMACHA 47,496 75 km
2003 MINE/OTAY 37,232 16 km
2008 YELLOW 33,232 94 km
2020 INDIA 24,193 94 km
2003 COYOTE 19,215 94 km
2007 AMMO FIRE 19,213 90 km
1993 GUEJITO 17,141 55 km
2006 HORSE 16,659 38 km
2020 VALLEY 16,517 33 km
1986 UNNAMED 16,390 99 km
1989 VAIL 15,632 88 km
2014 PULGAS 14,937 85 km
2011 EAGLE 14,743 91 km
1996 OTAY 322 12,238 14 km
2012 WILSON 12,048 81 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 53°F (12°C) 2.1 in Coldest
February 58°F (14°C) 2.1 in
March 59°F (15°C) 2.2 in Wettest
April 62°F (16°C) 0.7 in
May 64°F (18°C) 0.2 in
June 67°F (20°C) 0.1 in
July 71°F (22°C) 0.0 in Driest
August 73°F (23°C) 0.1 in Warmest
September 71°F (22°C) 0.2 in
October 67°F (20°C) 0.4 in
November 61°F (16°C) 1.1 in
December 57°F (14°C) 1.4 in

Chula Vista has a seasonal temperature swing of 20°F / from 53°F in January to 73°F in August. Total annual precipitation is 10.5 inches, with March being the wettest month (2.2") and July the driest (0.0").

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