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Weather & Climate in Lathrop, CA

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

Lathrop enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 48°F in January while summers reach 78°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 13.5 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 10 feet.

Temperature

48°F Jan (9°C) 78°F Jul (26°C)
Annual Average63.0°F
17% above US avg
January Average48°F (9°C)
July Average78°F (26°C)
Sunny Days330 days/yr

Geography

Elevation10 ft (3 m)
Area23.0 sq mi (59.6 km²)
Population Density1,649/sq mi
Coordinates37.8087°N, 121.3178°W
TimezoneAmerica/Los_Angeles
CountySan Joaquin County County
Nearest AirportNorman Y Mineta San Jose International (SJC)
45 miles away

Precipitation & Snow

Annual Rainfall 13.5"
65% below US avg
Wettest Month (Jan) 2.13"
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

4,086 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 98 km 11 km
Apr 18, 1990 5 km NNW of Aromas, California M5.4 102 km 5 km
Apr 18, 1990 4 km E of Interlaken, California M5.1 100 km 7 km
Aug 12, 1998 10 km SW of Ridgemark, California M5.1 118 km 9 km
Jan 16, 1993 9 km E of Gilroy, California M4.9 89 km 7 km
Apr 18, 1990 4 km NNW of Aromas, California M4.9 102 km 6 km
Apr 23, 1995 22 km NNE of Soledad, California M4.9 135 km 7 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 115 km 9 km
May 14, 2002 5 km SSW of Gilroy, California M4.9 97 km 7 km
Apr 19, 1996 2 km E of Aromas, California M4.9 106 km 5 km
May 21, 1996 8 km ESE of East Foothills, California M4.7 61 km 8 km
Apr 18, 1990 4 km N of Aromas, California M4.7 102 km 4 km
Aug 11, 1993 14 km ESE of Alum Rock, California M4.7 64 km 9 km
Aug 27, 2011 21 km NE of Soledad, California M4.6 137 km 8 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 121 km 8 km
Mar 24, 1991 1 km NNE of Interlaken, California M4.6 101 km 15 km
Sep 19, 2023 15 km SW of Westley, CA M4.5 41 km 4 km
Jan 12, 2011 9 km SSE of San Juan Bautista, California M4.5 116 km 8 km
Aug 3, 2006 5 km W of Glen Ellen, California M4.5 127 km 9 km
Apr 4, 2023 1km NNW of Tres Pinos, CA M4.4 112 km 10 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

87 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 5 injuries.

Date Rating Distance Path Fatalities
May 5, 1998 EF2 80 km 0.6 mi 0
Feb 7, 1978 EF2 100 km 1.9 mi 0
Apr 27, 1953 EF2 33 km 0.1 mi 0
Jan 11, 1951 EF2 86 km 5.7 mi 0
Mar 11, 2023 EF1 71 km 0.8 mi 0
Jan 10, 2023 EF1 58 km 0.4 mi 0
Nov 15, 2015 EF1 54 km 3.0 mi 0
Jan 23, 2010 EF1 41 km 1.6 mi 0
Apr 14, 2006 EF1 33 km 0.5 mi 0
Mar 20, 2005 EF1 99 km 3.0 mi 0
Dec 16, 2002 EF1 88 km 1.3 mi 0
May 5, 1998 EF1 85 km 0.3 mi 0
Dec 12, 1996 EF1 41 km 0.6 mi 0
Nov 22, 1996 EF1 93 km 0.2 mi 0
Apr 19, 1988 EF1 98 km 1.0 mi 0
Apr 19, 1988 EF1 43 km 0.2 mi 0
Jan 14, 1980 EF1 62 km 0.3 mi 0
Mar 4, 1978 EF1 60 km 1.0 mi 0
Mar 4, 1978 EF1 47 km 2.5 mi 0
Mar 1, 1978 EF1 37 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 70 km
1989 N. CALIFORNIA Earthquake 1.0 m 62 99 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m — 93 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m — 105 km
1865 N. CALIFORNIA Eruption + Earthquake — — 85 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (181 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 181 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 39 km
2015 BUTTE 72,894 81 km
2007 LICK 47,424 66 km
2006 CANYON 36,851 50 km
1988 MILLER 35,750 97 km
1992 GULCH 18,019 85 km
2003 ANNIE 17,383 65 km
2024 CORRAL 16,138 23 km
2001 DARBY 14,734 98 km
2018 WAVERLY 12,238 47 km
2009 CORRAL 12,006 28 km
1985 LEXINGTON 11,550 91 km
2001 CREEK 9,793 95 km
1992 MOCCASIN 9,565 90 km
1996 SCOTT 8,828 87 km
2015 WRAGG 8,455 100 km
2003 BIRD 7,727 29 km
1984 SITE 300 3 6,911 22 km
1988 BRIDGE 6,775 95 km
2005 TESLA 6,638 27 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 48°F (9°C) 2.1 in Wettest
February 51°F (10°C) 1.8 in
March 55°F (13°C) 1.8 in
April 60°F (15°C) 0.8 in
May 66°F (19°C) 0.2 in
June 71°F (22°C) 0.1 in
July 78°F (26°C) 0.0 in Warmest, Driest
August 75°F (24°C) 0.1 in
September 71°F (22°C) 0.3 in
October 65°F (18°C) 0.7 in
November 54°F (12°C) 1.8 in
December 46°F (8°C) 1.7 in Coldest

Lathrop has a seasonal temperature swing of 32°F / from 46°F in December to 78°F in July. Total annual precipitation is 11.4 inches, with January being the wettest month (2.1") and July the driest (0.0").

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