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Weather & Climate in Dixon, CA

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

Dixon enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 49°F in January while summers reach 79°F in July. The area gets 326 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 25.6 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 63 feet.

Temperature

49°F Jan (9°C) 79°F Jul (26°C)
Annual Average63.6°F
18% above US avg
January Average49°F (9°C)
July Average79°F (26°C)
Sunny Days326 days/yr

Geography

Elevation63 ft (19 m)
Area7.1 sq mi (18.4 km²)
Population Density2,698/sq mi
Coordinates38.4475°N, 121.8242°W
TimezoneAmerica/Los_Angeles
CountySolano County County
Nearest AirportSacramento International (SMF)
21 miles away

Precipitation & Snow

Annual Rainfall 25.6"
33% below US avg
Snowfall 0.0"
Wettest Month (Jan) 4.25"
Driest Month (Jul) 0.04"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score97.0 / 100
Social Vulnerability25.2 / 100
Community Resilience71.8 / 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 Low
Winter Weather Very Low
Lightning Relatively Moderate
Drought Relatively High
Cold Wave No Rating
Landslide Relatively High
Coastal Flood Relatively High
Tsunami Very Low
Volcano Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

4,162 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 50 km 11 km
Aug 10, 2016 20 km NNE of Upper Lake, California M5.1 130 km 14 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 52 km 9 km
Sep 4, 1995 13 km SW of Middletown, California M4.8 84 km 7 km
May 12, 2006 7 km W of Cobb, California M4.7 95 km 4 km
May 21, 1996 8 km ESE of East Foothills, California M4.7 121 km 8 km
Aug 11, 1993 14 km ESE of Alum Rock, California M4.7 127 km 9 km
Jan 2, 2025 4 km NW of Cobb, CA M4.7 92 km 1 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 96 km 8 km
Jan 11, 2000 6 km N of Geyserville, California M4.6 101 km 6 km
Feb 18, 2004 4 km WNW of Cobb, California M4.6 93 km 3 km
Sep 19, 2023 15 km SW of Westley, CA M4.5 121 km 4 km
Jan 12, 2014 8 km W of Cobb, California M4.5 95 km 2 km
Sep 25, 2012 3 km N of Talmage, California M4.5 141 km 11 km
Aug 3, 2006 5 km W of Glen Ellen, California M4.5 67 km 9 km
Jun 8, 2024 7 km NW of The Geysers, CA M4.5 96 km 4 km
Sep 19, 1992 7 km NW of Cobb, California M4.5 96 km 3 km
Apr 24, 2007 7 km WSW of Cobb, California M4.5 93 km 2 km
Jun 3, 2023 2km NW of The Geysers, CA M4.5 91 km 4 km
Mar 14, 2013 5 km W of Cobb, California M4.4 93 km 1 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

82 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 1 injury.

Date Rating Distance Path Fatalities
Feb 7, 1978 EF2 43 km 1.9 mi 0
Dec 24, 2015 EF1 68 km 6.2 mi 0
Oct 22, 2012 EF1 92 km 4.0 mi 0
Oct 22, 2012 EF1 70 km 2.0 mi 0
Oct 22, 2012 EF1 75 km 0.3 mi 0
Mar 18, 2011 EF1 77 km 0.1 mi 0
Jan 23, 2010 EF1 60 km 1.6 mi 0
Dec 5, 1998 EF1 76 km 1.5 mi 0
Dec 23, 1996 EF1 99 km 6.0 mi 0
Feb 22, 1996 EF1 80 km 1.0 mi 0
Dec 2, 1992 EF1 87 km 3.0 mi 0
Dec 2, 1992 EF1 94 km 7.5 mi 0
Dec 2, 1992 EF1 88 km 1.0 mi 0
Apr 19, 1988 EF1 66 km 0.2 mi 0
Apr 19, 1988 EF1 63 km 1.0 mi 0
Mar 22, 1983 EF1 51 km 2.0 mi 0
Feb 27, 1983 EF1 76 km 0.8 mi 0
May 31, 1967 EF1 70 km 0.1 mi 0
Nov 10, 1964 EF1 85 km 1.0 mi 0
Jan 14, 2023 EF0 61 km 0.3 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

4 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 87 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m — 113 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m — 102 km
1865 N. CALIFORNIA Eruption + Earthquake — — 139 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (101 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 101 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: HENNESSEY (314,241 acres, 2020).

Year Name Acres Burned Distance
2020 HENNESSEY 314,241 44 km
2015 ROCKY 96,125 75 km
2018 COUNTY 92,450 39 km
2019 KINCADE 77,780 86 km
2015 VALLEY 77,507 78 km
2020 GLASS 68,020 64 km
2017 NUNS 56,883 60 km
2017 ATLAS 51,664 37 km
2004 RUMSEY 39,335 52 km
1999 SIXTEEN 37,162 59 km
2017 TUBBS 36,981 76 km
1988 MILLER 35,750 24 km
2017 POCKET 18,691 99 km
2012 SIXTEEN COMPLEX 18,191 75 km
2024 CORRAL 16,138 96 km
2006 ZAM ASSIST 14,404 35 km
2008 WALKER 12,441 89 km
2018 WAVERLY 12,238 99 km
2004 GEYSERS 12,075 86 km
2009 CORRAL 12,006 100 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 49°F (9°C) 4.3 in Wettest
February 51°F (10°C) 3.7 in
March 54°F (12°C) 2.8 in
April 59°F (15°C) 0.9 in
May 65°F (18°C) 0.5 in
June 70°F (21°C) 0.2 in
July 79°F (26°C) 0.0 in Warmest, Driest
August 72°F (22°C) 0.0 in
September 70°F (21°C) 0.3 in
October 63°F (17°C) 0.9 in
November 53°F (12°C) 2.6 in
December 45°F (7°C) 2.8 in Coldest

Dixon has a seasonal temperature swing of 34°F / from 45°F in December to 79°F in July. Total annual precipitation is 19.0 inches, with January being the wettest month (4.3") and July the driest (0.0").

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