Weather & Climate in Twain, CA

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

Twain experiences four distinct seasons with an average annual temperature of 49°F (10°C). Winters average 34°F in January while summers reach 68°F in July. The area gets 275 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 37.1 inches. The area receives 109.3 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 4,458 feet.

Temperature

34°F Jan (1°C) 68°F Jul (20°C)

Annual Average	49.1°F
	9% below US avg
January Average	34°F (1°C)
July Average	68°F (20°C)
Sunny Days	275 days/yr

Geography

Elevation	4,458 ft (1,359 m)
Area	7.2 sq mi (18.6 km²)
Population Density	58/sq mi
Coordinates	40.0355°N, 121.0404°W
Timezone	America/Los_Angeles
County	Plumas County County
Nearest Airport	Chico Regional (CIC) 48 miles away

Precipitation & Snow

Annual Rainfall 37.1"

2% below US avg

Snowfall 109.3"

Wettest Month (Jan) 7.48"

Driest Month (Jul) 0.24"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	86.4 / 100
Social Vulnerability	91.4 / 100
Community Resilience	69.7 / 100

Hazard Breakdown

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

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

Earthquake History

1,811 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.7.

May 24, 2013	2 km NNE of Canyondam, California	M5.7	18 km	8 km
May 11, 2023	Lake Almanor Earthquake	M5.5	20 km	6 km
Aug 10, 2001	3 km N of Blairsden, California	M5.2	44 km	5 km
May 12, 2023	4km NW of Canyondam, CA	M5.2	19 km	6 km
Nov 26, 1998	7km NW of Redding, CA	M5.1	134 km	25 km
Apr 26, 2008	1 km NW of Mogul, Nevada	M5.1	110 km	3 km
Sep 8, 2023	12 km NE of Burney, CA	M5.0	111 km	16 km
May 24, 2013	1km NNW of Canyondam, CA	M4.9	16 km	4 km
Oct 30, 1998	4 km N of Tahoe Vista, California	M4.8	119 km	1 km
Apr 26, 2008	0 km N of Mogul, Nevada	M4.8	111 km	3 km
Feb 10, 1993	28 km SW of Empire, Nevada	M4.8	129 km	5 km
Jun 26, 2005	8 km NNW of Tahoe Vista, California	M4.8	115 km	-2 km
Jan 19, 2008	31 km NW of Rancho Tehama Reserve, California	M4.7	142 km	2 km
May 7, 2021	19km NW of Truckee, CA	M4.7	89 km	10 km
Nov 26, 1998	5km NNW of Redding, CA	M4.6	132 km	25 km
Nov 15, 1995	9 km SW of Cold Springs, Nevada	M4.5	96 km	-1 km
Jul 21, 1998	4 km NNW of Redding, California	M4.5	133 km	23 km
Jan 19, 2008	34 km WNW of Rancho Tehama Reserve, California	M4.5	147 km	10 km
Aug 4, 2016	5 km WNW of Patton Village, California	M4.5	72 km	7 km
May 10, 2005	10 km NW of Burney, California	M4.4	118 km	17 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
May 25, 2011	EF2	70 km	0.2 mi	0
Feb 10, 1994	EF2	73 km	0.3 mi	0
Sep 24, 1986	EF2	87 km	2.0 mi	0
Dec 19, 2023	EF1	73 km	0.4 mi	0
Aug 15, 2020	EF1	85 km	0.1 mi	0
Aug 14, 2020	EF1	85 km	0.4 mi	0
Jan 8, 2005	EF1	79 km	0.1 mi	0
Jan 7, 1993	EF1	90 km	0.1 mi	0
Dec 17, 1992	EF1	85 km	5.0 mi	0
Dec 17, 1992	EF1	73 km	1.0 mi	0
Mar 23, 1978	EF1	58 km	0.1 mi	0
Mar 4, 1978	EF1	78 km	1.5 mi	0
Apr 25, 2021	EF0	97 km	2.0 mi	0
Jan 4, 2021	EF0	84 km	2.7 mi	0
Nov 18, 2020	EF0	62 km	0.5 mi	0
Jul 20, 2015	EF0	88 km	3.2 mi	0
Mar 29, 2014	EF0	82 km	0.0 mi	0
Mar 25, 2014	EF0	65 km	0.3 mi	0
Feb 19, 2013	EF0	94 km	0.5 mi	0
Oct 22, 2012	EF0	96 km	0.4 mi	0

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

Nearby Volcanoes

5 volcanoes within 200 km. Closest: Lassen Volcanic Center (64 km).

Name	Type	Elevation	Last Eruption	Distance
Lassen Volcanic Center	Stratovolcano	3,187 m (10,456 ft)	1917	64 km
Medicine Lake	Shield	2,412 m (7,913 ft)	1060	180 km
Shasta	Stratovolcano	4,317 m (14,163 ft)	1250	181 km
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	190 km
Soda Lakes	Maar(s)	1,251 m (4,104 ft)	Unknown	194 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: DIXIE (979,795 acres, 2021).

Year	Name	Acres Burned	Distance
2021	DIXIE	979,795	35 km
2020	NORTH COMPLEX	316,556	35 km
2018	CAMP	153,687	55 km
1990	CAMPBELL	128,266	67 km
2021	SUGAR	108,368	74 km
2017	LONG VALLEY	80,456	96 km
2012	CHIPS	79,978	15 km
2007	MOONLIGHT	65,718	33 km
1999	GUN 2	61,203	67 km
2019	WALKER	58,747	39 km
2008	BTU LIGHTNING COMPLEX (LONG BRANCH-JACK)	52,091	40 km
2000	STORRIE	49,588	21 km
1994	COTTONWOOD	47,912	87 km
2020	LOYALTON	45,484	87 km
1994	BARKLEY	44,256	62 km
2014	BALD	39,770	96 km
1987	CLARK	39,194	63 km
1988	49R	36,673	89 km
1999	MHRD COMPLEX (BUCKS)	34,459	29 km
2020	NORTH	34,120	92 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	34°F (1°C)	7.5 in	Wettest
February	36°F (2°C)	6.1 in
March	39°F (4°C)	5.8 in
April	44°F (6°C)	2.8 in
May	52°F (11°C)	1.5 in
June	59°F (15°C)	0.8 in
July	68°F (20°C)	0.2 in	Warmest, Driest
August	65°F (18°C)	0.4 in
September	59°F (15°C)	1.0 in
October	50°F (10°C)	2.8 in
November	39°F (4°C)	5.9 in
December	33°F (1°C)	6.3 in	Coldest

Twain has a seasonal temperature swing of 35°F / from 33°F in December to 68°F in July. Total annual precipitation is 41.1 inches, with January being the wettest month (7.5") and July the driest (0.2").

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