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Weather & Climate in Clay, CA

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

Clay enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 48°F in January while summers reach 76°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 18.4 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 136 feet.

Temperature

48°F Jan (9°C) 76°F Jul (24°C)
Annual Average62.2°F
15% above US avg
January Average48°F (9°C)
July Average76°F (24°C)
Sunny Days330 days/yr

Geography

Elevation136 ft (41 m)
Area6.8 sq mi (17.5 km²)
Population Density196/sq mi
Coordinates38.3140°N, 121.1596°W
TimezoneAmerica/Los_Angeles
CountySacramento County County
Nearest AirportSacramento International (SMF)
35 miles away

Precipitation & Snow

Annual Rainfall 18.4"
52% below US avg
Snowfall 0.0"
Wettest Month (Jan) 3.98"
Driest Month (Jul) 0.08"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score98.1 / 100
Social Vulnerability37.4 / 100
Community Resilience57.0 / 100

Hazard Breakdown

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

Earthquake History

3,716 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.1.

Sep 12, 1994 4 km S of Carter Springs, Nevada M6.1 143 km 14 km
Aug 24, 2014 The 2014 South Napa, California Earthquake M6.0 101 km 11 km
Jul 8, 2021 Antelope Valley, CA M6.0 146 km 7 km
Sep 12, 1994 8 km ESE of Mesa Vista, California M5.1 137 km -1 km
Jul 8, 2021 32km SE of Markleeville, CA M5.0 146 km 7 km
Jan 16, 1993 9 km E of Gilroy, California M4.9 147 km 7 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 110 km 9 km
Dec 22, 1995 California-Nevada border region M4.9 140 km 4 km
Dec 28, 1995 9 km WNW of Topaz Lake, Nevada M4.8 138 km -1 km
Sep 4, 1995 13 km SW of Middletown, California M4.8 144 km 7 km
Oct 30, 1998 4 km N of Tahoe Vista, California M4.8 145 km 1 km
Jun 26, 2005 8 km NNW of Tahoe Vista, California M4.8 144 km -2 km
May 21, 1996 8 km ESE of East Foothills, California M4.7 117 km 8 km
Dec 23, 1995 8 km WNW of Topaz Lake, Nevada M4.7 141 km -1 km
Aug 11, 1993 14 km ESE of Alum Rock, California M4.7 120 km 9 km
May 7, 2021 19km NW of Truckee, CA M4.7 147 km 10 km
Jul 8, 2021 29km ENE of Dardanelle, CA M4.6 142 km 2 km
Dec 12, 1996 4 km SSW of Topaz Lake, Nevada M4.6 144 km -2 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 141 km 8 km
Jul 9, 2021 30km SE of Markleeville, CA M4.6 143 km 4 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
Feb 7, 1978 EF2 50 km 1.9 mi 0
Apr 27, 1953 EF2 75 km 0.1 mi 0
Mar 11, 2023 EF1 70 km 0.8 mi 0
Jan 10, 2023 EF1 44 km 0.4 mi 0
Dec 24, 2015 EF1 44 km 6.2 mi 0
Nov 15, 2015 EF1 92 km 3.0 mi 0
Oct 22, 2012 EF1 91 km 0.3 mi 0
Oct 22, 2012 EF1 93 km 2.0 mi 0
Oct 22, 2012 EF1 82 km 4.0 mi 0
Jan 23, 2010 EF1 69 km 1.6 mi 0
Apr 14, 2006 EF1 75 km 0.5 mi 0
Dec 12, 1996 EF1 66 km 0.6 mi 0
Apr 19, 1988 EF1 16 km 0.2 mi 0
Apr 19, 1988 EF1 41 km 1.0 mi 0
Mar 22, 1983 EF1 48 km 2.0 mi 0
Mar 4, 1978 EF1 81 km 2.5 mi 0
Mar 1, 1978 EF1 74 km 1.5 mi 0
May 31, 1967 EF1 40 km 0.1 mi 0
Apr 1, 1958 EF1 100 km 2.0 mi 0
Jan 14, 2023 EF0 2 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 30 107 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m — 135 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m — 136 km
1865 N. CALIFORNIA Eruption + Earthquake — — 140 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

3 volcanoes within 200 km. Closest: Clear Lake (158 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 158 km
Mono Lake Volcanic Field Pyroclastic cone(s) 2,121 m (6,959 ft) 1790 189 km
Mono-Inyo Craters Lava dome(s) 2,796 m (9,173 ft) 1380 195 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 96 km
2021 CALDOR 226,583 88 km
2014 KING 99,070 87 km
2018 COUNTY 92,450 96 km
2022 MOSQUITO 77,858 91 km
2015 BUTTE 72,894 50 km
2017 ATLAS 51,664 94 km
1988 MILLER 35,750 83 km
1992 CLEVELAND 21,835 86 km
1992 GULCH 18,019 61 km
2004 POWER 17,266 79 km
2024 CORRAL 16,138 80 km
2001 DARBY 14,734 76 km
2006 ZAM ASSIST 14,404 81 km
2018 WAVERLY 12,238 44 km
2009 CORRAL 12,006 85 km
1992 MOCCASIN 9,565 93 km
1996 SCOTT 8,828 30 km
2015 WRAGG 8,455 81 km
2004 FREDS 8,147 90 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 48°F (9°C) 4.0 in Wettest
February 51°F (10°C) 3.5 in
March 54°F (12°C) 3.4 in
April 59°F (15°C) 1.4 in
May 66°F (19°C) 0.5 in
June 73°F (23°C) 0.2 in
July 76°F (24°C) 0.1 in Warmest, Driest
August 76°F (24°C) 0.1 in
September 72°F (22°C) 0.4 in
October 64°F (18°C) 1.2 in
November 53°F (12°C) 2.9 in
December 46°F (8°C) 2.8 in Coldest

Clay has a seasonal temperature swing of 30°F / from 46°F in December to 76°F in July. Total annual precipitation is 20.4 inches, with January being the wettest month (4.0") and July the driest (0.1").

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