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Weather & Climate in Temelec, CA

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

Temelec enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 48°F in January while summers reach 70°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 28.4 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 119 feet.

Temperature

48°F Jan (9°C) 70°F Jul (21°C)
Annual Average59.0°F
9% above US avg
January Average48°F (9°C)
July Average70°F (21°C)
Sunny Days326 days/yr

Geography

Elevation119 ft (36 m)
Area1.6 sq mi (4.1 km²)
Population Density1,067/sq mi
Coordinates38.2578°N, 122.4982°W
TimezoneAmerica/Los_Angeles
CountyNapa County County
Nearest AirportMetro Oakland International (OAK)
40 miles away

Precipitation & Snow

Annual Rainfall 28.4"
25% below US avg
Snowfall 0.0"
Wettest Month (Jan) 6.38"
Driest Month (Jul) 0.04"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score95.3 / 100
Social Vulnerability38.5 / 100
Community Resilience76.0 / 100

Hazard Breakdown

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

Earthquake History

4,272 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 17 km 11 km
Aug 10, 2016 20 km NNE of Upper Lake, California M5.1 122 km 14 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 15 km 9 km
Sep 4, 1995 13 km SW of Middletown, California M4.8 52 km 7 km
Apr 18, 2007 15 km N of Potter Valley, California M4.8 144 km 5 km
May 12, 2006 7 km W of Cobb, California M4.7 68 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 69 km 1 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 42 km 8 km
Jan 11, 2000 6 km N of Geyserville, California M4.6 67 km 6 km
Feb 18, 2004 4 km WNW of Cobb, California M4.6 69 km 3 km
Sep 19, 2023 15 km SW of Westley, CA M4.5 140 km 4 km
Jan 12, 2014 8 km W of Cobb, California M4.5 68 km 2 km
Sep 25, 2012 3 km N of Talmage, California M4.5 117 km 11 km
Aug 3, 2006 5 km W of Glen Ellen, California M4.5 14 km 9 km
Jun 8, 2024 7 km NW of The Geysers, CA M4.5 68 km 4 km
Sep 19, 1992 7 km NW of Cobb, California M4.5 72 km 3 km
Apr 24, 2007 7 km WSW of Cobb, California M4.5 65 km 2 km
Jun 3, 2023 2km NW of The Geysers, CA M4.5 64 km 4 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
Jun 1, 1958 EF2 42 km 15.0 mi 0
Mar 18, 2011 EF1 28 km 0.1 mi 0
Jan 23, 2010 EF1 75 km 1.6 mi 0
Mar 20, 2005 EF1 68 km 3.0 mi 0
Jan 27, 2005 EF1 68 km 0.5 mi 0
Dec 5, 1998 EF1 28 km 1.5 mi 0
Dec 23, 1996 EF1 38 km 6.0 mi 0
Feb 22, 1996 EF1 38 km 1.0 mi 0
Dec 2, 1992 EF1 33 km 1.0 mi 0
Dec 2, 1992 EF1 39 km 7.5 mi 0
Dec 2, 1992 EF1 43 km 3.0 mi 0
Feb 27, 1983 EF1 28 km 0.8 mi 0
Nov 10, 1964 EF1 40 km 1.0 mi 0
Feb 17, 1959 EF1 72 km 0.5 mi 0
Apr 1, 1958 EF1 72 km 0.2 mi 0
Sep 28, 2019 EF0 74 km 1.7 mi 0
Jan 11, 2017 EF0 98 km 0.4 mi 0
Apr 27, 2016 EF0 44 km 0.2 mi 0
Feb 28, 2014 EF0 80 km 0.7 mi 0
Apr 7, 2011 EF0 33 km 0.1 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 71 km
1989 N. CALIFORNIA Earthquake 1.0 m 62 146 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m — 86 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m — 62 km
1865 N. CALIFORNIA Eruption + Earthquake — — 129 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (83 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 83 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 45 km
2015 ROCKY 96,125 73 km
2018 COUNTY 92,450 56 km
2019 KINCADE 77,780 52 km
2015 VALLEY 77,507 60 km
2020 GLASS 68,020 33 km
2017 NUNS 56,883 10 km
2020 WALLBRIDGE 55,194 60 km
2017 ATLAS 51,664 26 km
2018 RIVER 48,920 100 km
2004 RUMSEY 39,335 59 km
1999 SIXTEEN 37,162 62 km
2017 TUBBS 36,981 38 km
1988 MILLER 35,750 40 km
2017 POCKET 18,691 66 km
2012 SIXTEEN COMPLEX 18,191 85 km
2006 ZAM ASSIST 14,404 76 km
2008 WALKER 12,441 90 km
2004 GEYSERS 12,075 57 km
1995 VISION 11,931 40 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 48°F (9°C) 6.4 in Wettest
February 51°F (11°C) 5.6 in
March 54°F (12°C) 4.3 in
April 57°F (14°C) 1.6 in
May 62°F (17°C) 0.7 in
June 67°F (19°C) 0.2 in
July 70°F (21°C) 0.0 in Driest
August 70°F (21°C) 0.1 in Warmest
September 68°F (20°C) 0.4 in
October 63°F (17°C) 1.7 in
November 54°F (12°C) 4.3 in
December 47°F (8°C) 4.8 in Coldest

Temelec has a seasonal temperature swing of 23°F / from 47°F in December to 70°F in August. Total annual precipitation is 30.0 inches, with January being the wettest month (6.4") and July the driest (0.0").

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