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Weather & Climate in Tracy, CA

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

Tracy enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 48°F in January while summers reach 80°F in July. The area gets 327 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 29.3 inches (drier than the 38-inch national average). The area receives 1.2 inches of snow annually. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 66 feet.

Temperature

48°F Jan (9°C) 80°F Jul (26°C)
Annual Average61.7°F
14% above US avg
January Average48°F (9°C)
July Average80°F (26°C)
Sunny Days327 days/yr

Geography

Elevation66 ft (20 m)
Area22.1 sq mi (57.3 km²)
Population Density3,620/sq mi
Coordinates37.7274°N, 121.4522°W
TimezoneAmerica/Los_Angeles
CountySan Joaquin County County
Nearest AirportNorman Y Mineta San Jose International (SJC)
36 miles away

Precipitation & Snow

Annual Rainfall 29.3"
23% below US avg
Snowfall 1.2"
Wettest Month (Jan) 2.01"
Driest Month (Jul) 0.04"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score98.6 / 100
Social Vulnerability39.7 / 100
Community Resilience47.0 / 100

Hazard Breakdown

Tornado Relatively Low
Earthquake Relatively High
Wildfire Relatively Moderate
Flood Relatively High
Hail Relatively Low
Strong Wind Relatively Low
Heat Wave Relatively High
Winter Weather Relatively Low
Lightning Relatively High
Drought Very High
Cold Wave No Rating
Landslide Very Low
Volcano Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

4,163 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 93 km 11 km
Apr 18, 1990 5 km NNW of Aromas, California M5.4 90 km 5 km
Aug 12, 1998 10 km SW of Ridgemark, California M5.1 108 km 9 km
Apr 18, 1990 4 km E of Interlaken, California M5.1 88 km 7 km
Jan 16, 1993 9 km E of Gilroy, California M4.9 79 km 7 km
May 14, 2002 5 km SSW of Gilroy, California M4.9 86 km 7 km
Apr 19, 1996 2 km E of Aromas, California M4.9 95 km 5 km
Apr 18, 1990 4 km NNW of Aromas, California M4.9 90 km 6 km
Apr 23, 1995 22 km NNE of Soledad, California M4.9 127 km 7 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 111 km 9 km
Apr 18, 1990 4 km N of Aromas, California M4.7 91 km 4 km
May 21, 1996 8 km ESE of East Foothills, California M4.7 47 km 8 km
Aug 11, 1993 14 km ESE of Alum Rock, California M4.7 50 km 9 km
Aug 27, 2011 21 km NE of Soledad, California M4.6 129 km 8 km
Mar 24, 1991 1 km NNE of Interlaken, California M4.6 88 km 15 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 110 km 8 km
Sep 19, 2023 15 km SW of Westley, CA M4.5 35 km 4 km
Jan 12, 2011 9 km SSE of San Juan Bautista, California M4.5 106 km 8 km
Aug 3, 2006 5 km W of Glen Ellen, California M4.5 122 km 9 km
Apr 4, 2023 1km NNW of Tres Pinos, CA M4.4 104 km 10 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

90 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 10 injuries.

Date Rating Distance Path Fatalities
May 5, 1998 EF2 65 km 0.6 mi 0
Mar 11, 1985 EF2 98 km 0.5 mi 0
Apr 27, 1953 EF2 41 km 0.1 mi 0
Jan 11, 1951 EF2 71 km 5.7 mi 0
Dec 14, 2024 EF1 91 km 0.3 mi 0
Mar 11, 2023 EF1 84 km 0.8 mi 0
Jan 10, 2023 EF1 73 km 0.4 mi 0
Nov 15, 2015 EF1 61 km 3.0 mi 0
Jan 23, 2010 EF1 34 km 1.6 mi 0
Apr 14, 2006 EF1 41 km 0.5 mi 0
Mar 20, 2005 EF1 86 km 3.0 mi 0
Dec 16, 2002 EF1 93 km 1.3 mi 0
Dec 20, 2001 EF1 89 km 0.5 mi 0
May 5, 1998 EF1 70 km 0.3 mi 0
Dec 12, 1996 EF1 53 km 0.6 mi 0
Nov 22, 1996 EF1 99 km 0.2 mi 0
Apr 19, 1988 EF1 56 km 0.2 mi 0
Jan 14, 1980 EF1 47 km 0.3 mi 0
Mar 4, 1978 EF1 63 km 1.0 mi 0
Mar 4, 1978 EF1 56 km 2.5 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 57 km
1989 N. CALIFORNIA Earthquake 1.0 m 62 86 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m — 79 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m — 92 km
1865 N. CALIFORNIA Eruption + Earthquake — — 71 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (180 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 180 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 26 km
2020 CZU AUG LIGHTNING 85,894 93 km
2015 BUTTE 72,894 96 km
2017 ATLAS 51,664 99 km
2007 LICK 47,424 56 km
2006 CANYON 36,851 42 km
1988 MILLER 35,750 96 km
1992 GULCH 18,019 99 km
2003 ANNIE 17,383 58 km
2024 CORRAL 16,138 10 km
2018 WAVERLY 12,238 61 km
2009 CORRAL 12,006 15 km
1985 LEXINGTON 11,550 76 km
1996 SCOTT 8,828 100 km
2015 WRAGG 8,455 100 km
2009 LOCKHEED 8,287 98 km
2003 BIRD 7,727 22 km
1984 SITE 300 3 6,911 9 km
2005 TESLA 6,638 12 km
2003 DEL PUERTO 6,441 33 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 48°F (9°C) 2.0 in Wettest
February 51°F (10°C) 1.7 in
March 55°F (13°C) 1.6 in
April 59°F (15°C) 0.8 in
May 65°F (19°C) 0.3 in
June 71°F (22°C) 0.1 in
July 80°F (26°C) 0.0 in Warmest, Driest
August 75°F (24°C) 0.1 in
September 72°F (22°C) 0.2 in
October 65°F (18°C) 0.7 in
November 54°F (12°C) 1.6 in
December 46°F (8°C) 1.5 in Coldest

Tracy has a seasonal temperature swing of 33°F / from 46°F in December to 80°F in July. Total annual precipitation is 10.7 inches, with January being the wettest month (2.0") and July the driest (0.0").

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