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Weather & Climate in Terminous, CA

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

Terminous 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 -10 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

Elevation-10 ft (-3 m)
Area1.0 sq mi (2.5 km²)
Population Density364/sq mi
Coordinates38.1153°N, 121.4896°W
TimezoneAmerica/Los_Angeles
CountySacramento County County
Nearest AirportSacramento International (SMF)
40 miles away

Precipitation & Snow

Annual Rainfall 18.4"
52% below US avg
Snowfall 0.0"
Wettest Month (Jan) 3.19"
Driest Month (Jul) 0.04"

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

4,971 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 73 km 11 km
Apr 18, 1990 5 km NNW of Aromas, California M5.4 132 km 5 km
Apr 18, 1990 4 km E of Interlaken, California M5.1 130 km 7 km
Jan 16, 1993 9 km E of Gilroy, California M4.9 122 km 7 km
Apr 19, 1996 2 km E of Aromas, California M4.9 137 km 5 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 86 km 9 km
Apr 18, 1990 4 km NNW of Aromas, California M4.9 133 km 6 km
May 14, 2002 5 km SSW of Gilroy, California M4.9 128 km 7 km
Sep 4, 1995 13 km SW of Middletown, California M4.8 126 km 7 km
May 12, 2006 7 km W of Cobb, California M4.7 139 km 4 km
May 21, 1996 8 km ESE of East Foothills, California M4.7 87 km 8 km
Apr 18, 1990 4 km N of Aromas, California M4.7 133 km 4 km
Aug 11, 1993 14 km ESE of Alum Rock, California M4.7 91 km 9 km
Jan 2, 2025 4 km NW of Cobb, CA M4.7 137 km 1 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 107 km 8 km
Mar 24, 1991 1 km NNE of Interlaken, California M4.6 130 km 15 km
Jan 11, 2000 6 km N of Geyserville, California M4.6 144 km 6 km
Feb 18, 2004 4 km WNW of Cobb, California M4.6 137 km 3 km
Jan 12, 2014 8 km W of Cobb, California M4.5 139 km 2 km
Sep 19, 2023 15 km SW of Westley, CA M4.5 77 km 4 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: 5 injuries.

Date Rating Distance Path Fatalities
May 5, 1998 EF2 96 km 0.6 mi 0
Feb 7, 1978 EF2 65 km 1.9 mi 0
Apr 27, 1953 EF2 67 km 0.1 mi 0
Jan 11, 1951 EF2 100 km 5.7 mi 0
Mar 11, 2023 EF1 87 km 0.8 mi 0
Jan 10, 2023 EF1 64 km 0.4 mi 0
Dec 24, 2015 EF1 73 km 6.2 mi 0
Nov 15, 2015 EF1 88 km 3.0 mi 0
Jan 23, 2010 EF1 33 km 1.6 mi 0
Apr 14, 2006 EF1 67 km 0.5 mi 0
Mar 20, 2005 EF1 97 km 3.0 mi 0
May 5, 1998 EF1 99 km 0.3 mi 0
Dec 12, 1996 EF1 68 km 0.6 mi 0
Apr 19, 1988 EF1 69 km 1.0 mi 0
Apr 19, 1988 EF1 30 km 0.2 mi 0
Mar 22, 1983 EF1 68 km 2.0 mi 0
Jan 14, 1980 EF1 79 km 0.3 mi 0
Mar 4, 1978 EF1 96 km 1.0 mi 0
Mar 4, 1978 EF1 79 km 2.5 mi 0
Mar 1, 1978 EF1 70 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 71 km
1989 N. CALIFORNIA Earthquake 1.0 m 62 125 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m — 99 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m — 100 km
1865 N. CALIFORNIA Eruption + Earthquake — — 108 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (146 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 146 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 69 km
2020 HENNESSEY 314,241 89 km
2018 COUNTY 92,450 86 km
2015 BUTTE 72,894 80 km
2017 NUNS 56,883 92 km
2017 ATLAS 51,664 71 km
2007 LICK 47,424 99 km
2004 RUMSEY 39,335 99 km
2006 CANYON 36,851 85 km
1988 MILLER 35,750 63 km
1992 GULCH 18,019 89 km
2024 CORRAL 16,138 53 km
2006 ZAM ASSIST 14,404 80 km
2018 WAVERLY 12,238 58 km
2009 CORRAL 12,006 58 km
1996 SCOTT 8,828 63 km
2015 WRAGG 8,455 65 km
2003 BIRD 7,727 64 km
2014 MONTICELLO 6,984 69 km
1984 SITE 300 3 6,911 52 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 48°F (9°C) 3.2 in Wettest
February 51°F (10°C) 2.8 in
March 55°F (13°C) 2.4 in
April 59°F (15°C) 0.9 in
May 65°F (19°C) 0.4 in
June 70°F (21°C) 0.1 in
July 76°F (24°C) 0.0 in Warmest, Driest
August 72°F (22°C) 0.1 in
September 69°F (21°C) 0.3 in
October 63°F (17°C) 0.9 in
November 53°F (12°C) 2.2 in
December 45°F (7°C) 2.2 in Coldest

Terminous has a seasonal temperature swing of 30°F / from 45°F in December to 76°F in July. Total annual precipitation is 15.5 inches, with January being the wettest month (3.2") and July the driest (0.0").

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