Weather & Climate in College City, CA

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

College City enjoys a temperate climate with an average annual temperature of 62°F (16°C). Winters average 46°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 17.2 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 62 feet.

Temperature

46°F Jan (8°C) 76°F Jul (25°C)

Annual Average	61.5°F
	14% above US avg
January Average	46°F (8°C)
July Average	76°F (25°C)
Sunny Days	330 days/yr

Geography

Elevation	62 ft (19 m)
Area	3.3 sq mi (8.5 km²)
Population Density	196/sq mi
Coordinates	39.0061°N, 122.0051°W
Timezone	America/Los_Angeles
County	Colusa County County
Nearest Airport	Sacramento International (SMF) 31 miles away

Precipitation & Snow

Annual Rainfall 17.2"

55% below US avg

Snowfall 0.0"

Wettest Month (Jan) 3.46"

Driest Month (Jul) 0.04"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	81.1 / 100
Social Vulnerability	49.5 / 100
Community Resilience	25.4 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Relatively Moderate
Wildfire	Relatively Moderate
Flood	Relatively Low
Hail	Very Low
Strong Wind	Very Low
Heat Wave	Relatively Low
Winter Weather	Very Low
Lightning	Very Low
Drought	Very High
Cold Wave	No Rating
Landslide	Relatively Low
Volcano	Very Low
Avalanche	Very Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

4,273 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	92 km	11 km
Aug 10, 2001	3 km N of Blairsden, California	M5.2	149 km	5 km
Aug 10, 2016	20 km NNE of Upper Lake, California	M5.1	78 km	14 km
Sep 3, 2000	5 km WSW of Yountville, California	M4.9	78 km	9 km
Sep 4, 1995	13 km SW of Middletown, California	M4.8	73 km	7 km
Apr 18, 2007	15 km N of Potter Valley, California	M4.8	108 km	5 km
May 12, 2006	7 km W of Cobb, California	M4.7	73 km	4 km
Jan 19, 2008	31 km NW of Rancho Tehama Reserve, California	M4.7	143 km	2 km
Jan 2, 2025	4 km NW of Cobb, CA	M4.7	67 km	1 km
Aug 18, 1999	0 km S of Bolinas, California	M4.6	136 km	8 km
Jan 11, 2000	6 km N of Geyserville, California	M4.6	83 km	6 km
Feb 18, 2004	4 km WNW of Cobb, California	M4.6	69 km	3 km
Jan 12, 2014	8 km W of Cobb, California	M4.5	73 km	2 km
Sep 25, 2012	3 km N of Talmage, California	M4.5	102 km	11 km
Aug 3, 2006	5 km W of Glen Ellen, California	M4.5	88 km	9 km
Jan 19, 2008	34 km WNW of Rancho Tehama Reserve, California	M4.5	144 km	10 km
Jun 8, 2024	7 km NW of The Geysers, CA	M4.5	74 km	4 km
Sep 19, 1992	7 km NW of Cobb, California	M4.5	70 km	3 km
Apr 24, 2007	7 km WSW of Cobb, California	M4.5	72 km	2 km
Jun 3, 2023	2km NW of The Geysers, CA	M4.5	71 km	4 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

84 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 7 injuries.

Date	Rating	Distance	Path	Fatalities
May 25, 2011	EF2	74 km	0.2 mi	0
Feb 10, 1994	EF2	68 km	0.3 mi	0
Feb 7, 1978	EF2	59 km	1.9 mi	0
May 19, 1953	EF2	84 km	2.0 mi	0
Dec 19, 2023	EF1	90 km	0.4 mi	0
Dec 24, 2015	EF1	84 km	6.2 mi	0
Mar 26, 2014	EF1	64 km	1.0 mi	0
Mar 26, 2014	EF1	65 km	0.6 mi	0
Mar 26, 2014	EF1	65 km	0.7 mi	0
Oct 22, 2012	EF1	33 km	2.0 mi	0
Oct 22, 2012	EF1	42 km	0.3 mi	0
Oct 22, 2012	EF1	79 km	4.0 mi	0
May 25, 2011	EF1	70 km	21.7 mi	0
May 25, 2011	EF1	60 km	26.4 mi	0
Mar 18, 2011	EF1	87 km	0.1 mi	0
Jan 8, 2005	EF1	62 km	0.1 mi	0
Dec 5, 1998	EF1	86 km	1.5 mi	0
Feb 22, 1996	EF1	81 km	1.0 mi	0
Apr 17, 1993	EF1	59 km	0.5 mi	0
Jan 7, 1993	EF1	52 km	0.1 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

1 tsunami 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	146 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

2 volcanoes within 200 km. Closest: Clear Lake (66 km).

Name	Type	Elevation	Last Eruption	Distance
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	66 km
Lassen Volcanic Center	Stratovolcano	3,187 m (10,456 ft)	1917	171 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: RANCH (427,048 acres, 2018).

Year	Name	Acres Burned	Distance
2018	RANCH	427,048	73 km
2020	HENNESSEY	314,241	49 km
2018	CAMP	153,687	91 km
2015	ROCKY	96,125	40 km
2018	COUNTY	92,450	38 km
1996	FORK	83,209	67 km
2019	KINCADE	77,780	76 km
2015	VALLEY	77,507	58 km
2020	GLASS	68,020	69 km
2017	NUNS	56,883	85 km
2020	WALLBRIDGE	55,194	97 km
2017	ATLAS	51,664	74 km
2018	RIVER	48,920	88 km
2004	RUMSEY	39,335	36 km
1999	SIXTEEN	37,162	36 km
2017	TUBBS	36,981	76 km
1988	49R	36,673	74 km
1988	MILLER	35,750	65 km
2012	MILL	29,924	64 km
2001	TROUGH	25,270	75 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	46°F (8°C)	3.5 in	Wettest
February	51°F (10°C)	2.8 in
March	55°F (13°C)	2.4 in
April	60°F (15°C)	0.9 in
May	67°F (20°C)	0.3 in
June	73°F (23°C)	0.2 in
July	76°F (25°C)	0.0 in	Warmest, Driest
August	75°F (24°C)	0.1 in
September	72°F (22°C)	0.3 in
October	64°F (18°C)	1.1 in
November	53°F (11°C)	2.6 in
December	46°F (8°C)	2.7 in	Coldest

College City has a seasonal temperature swing of 31°F / from 46°F in December to 76°F in July. Total annual precipitation is 16.8 inches, with January being the wettest month (3.5") and July the driest (0.0").

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