Weather & Climate in Millville, CA

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

Millville enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 48°F in January while summers reach 83°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 33.5 inches. The area receives 2.6 inches of snow annually. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 641 feet.

Temperature

48°F Jan (9°C) 83°F Jul (29°C)

Annual Average	63.4°F
	17% above US avg
January Average	48°F (9°C)
July Average	83°F (29°C)
Sunny Days	275 days/yr

Geography

Elevation	641 ft (195 m)
Area	8.2 sq mi (21.3 km²)
Population Density	104/sq mi
Coordinates	40.5596°N, 122.1756°W
Timezone	America/Los_Angeles
County	Shasta County County
Nearest Airport	Redding Regional (RDD) 8 miles away

Precipitation & Snow

Annual Rainfall 33.5"

12% below US avg

Snowfall 2.6"

Wettest Month (Jan) 7.95"

Driest Month (Jul) 0.12"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	93.4 / 100
Social Vulnerability	41.1 / 100
Community Resilience	47.7 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Relatively Moderate
Wildfire	Relatively High
Flood	Relatively High
Hail	Very Low
Strong Wind	Very Low
Heat Wave	Relatively Moderate
Winter Weather	Relatively Moderate
Lightning	Relatively Moderate
Drought	Relatively Moderate
Cold Wave	Very Low
Landslide	Relatively Moderate
Volcano	Relatively Moderate
Avalanche	Very Low

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

Earthquake History

1,792 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	103 km	8 km
May 11, 2023	Lake Almanor Earthquake	M5.5	99 km	6 km
Apr 30, 2008	3 km NNW of Burnt Ranch, California	M5.4	116 km	28 km
May 12, 2023	4km NW of Canyondam, CA	M5.2	100 km	6 km
Nov 26, 1998	7km NW of Redding, CA	M5.1	22 km	25 km
Aug 10, 2016	20 km NNE of Upper Lake, California	M5.1	147 km	14 km
Sep 8, 2023	12 km NE of Burney, CA	M5.0	68 km	16 km
Jan 18, 1990	27 km ESE of Orick, California	M4.9	150 km	35 km
May 24, 2013	1km NNW of Canyondam, CA	M4.9	102 km	4 km
Jul 21, 2016	19km SSE of Blue Lake, CA	M4.8	146 km	26 km
Apr 18, 2007	15 km N of Potter Valley, California	M4.8	145 km	5 km
Jan 19, 2008	31 km NW of Rancho Tehama Reserve, California	M4.7	62 km	2 km
Nov 26, 1998	5km NNW of Redding, CA	M4.6	20 km	25 km
Jul 21, 1998	4 km NNW of Redding, California	M4.5	21 km	23 km
Jan 19, 2008	34 km WNW of Rancho Tehama Reserve, California	M4.5	66 km	10 km
Aug 28, 2016	8 km ESE of Mad River, California	M4.5	105 km	36 km
May 10, 2005	10 km NW of Burney, California	M4.4	56 km	17 km
Mar 9, 1992	8 km SE of Hyampom, California	M4.4	101 km	33 km
Apr 5, 2024	6 km NW of Belden, CA	M4.4	94 km	8 km
Mar 27, 1997	14km SW of Manton, CA	M4.4	30 km	8 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
Sep 24, 1986	EF2	71 km	2.0 mi	0
May 9, 1980	EF2	48 km	0.1 mi	0
May 19, 1953	EF2	90 km	2.0 mi	0
Dec 19, 2023	EF1	89 km	0.4 mi	0
Mar 23, 1978	EF1	100 km	0.1 mi	0
Mar 5, 1978	EF1	59 km	0.1 mi	0
Mar 4, 1978	EF1	84 km	1.5 mi	0
Apr 25, 2021	EF0	82 km	2.0 mi	0
Jan 4, 2021	EF0	68 km	0.8 mi	0
Jan 4, 2021	EF0	68 km	2.7 mi	0
Mar 29, 2014	EF0	81 km	0.0 mi	0
Apr 4, 2013	EF0	45 km	0.8 mi	0
Feb 19, 2013	EF0	56 km	0.5 mi	0
Mar 8, 2010	EF0	98 km	0.3 mi	0
Jul 5, 2000	EF0	98 km	0.2 mi	0
Apr 17, 1993	EF0	97 km	0.1 mi	0
Mar 14, 1987	EF0	74 km	0.2 mi	0
Jan 22, 1981	EF0	96 km	0.1 mi	0
Mar 5, 1978	EF0	62 km	0.1 mi	0
Mar 5, 1978	EF0	26 km	0.1 mi	0

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

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Lassen Volcanic Center (57 km).

Name	Type	Elevation	Last Eruption	Distance
Lassen Volcanic Center	Stratovolcano	3,187 m (10,456 ft)	1917	57 km
Shasta	Stratovolcano	4,317 m (14,163 ft)	1250	95 km
Medicine Lake	Shield	2,412 m (7,913 ft)	1060	128 km
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	184 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: AUGUST COMPLEX (1,068,802 acres, 2020).

Year	Name	Acres Burned	Distance
2020	AUGUST COMPLEX	1,068,802	100 km
2018	CARR	233,710	39 km
2021	MONUMENT	226,125	93 km
2021	HAYPRESS	204,549	92 km
1990	CAMPBELL	128,266	65 km
2021	MCFARLAND	121,554	70 km
2006	PIGEON	100,962	97 km
2008	YOLLA BOLLY COMPLEX (IRON)	94,888	85 km
2012	CHIPS	79,978	98 km
2018	DELTA	63,732	55 km
1992	FOUNTAIN	62,340	42 km
1999	GUN 2	61,203	53 km
2020	ZOGG	56,941	41 km
2000	STORRIE	49,588	96 km
2012	BAGLEY	47,731	54 km
2018	HIRZ	46,700	48 km
1994	BARKLEY	44,256	60 km
2014	BALD	39,770	80 km
2008	SHU LIGHTNING COMPLEX (MOON)	36,514	41 km
2008	IRON AND ALPS COMPLEXES (EAGLE)	32,397	85 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	48°F (9°C)	8.0 in	Wettest
February	49°F (10°C)	6.3 in
March	53°F (11°C)	6.2 in
April	58°F (14°C)	2.8 in
May	67°F (19°C)	1.7 in
June	76°F (24°C)	0.7 in
July	83°F (29°C)	0.1 in	Warmest, Driest
August	81°F (27°C)	0.4 in
September	75°F (24°C)	1.1 in
October	65°F (18°C)	2.4 in
November	52°F (11°C)	5.9 in
December	46°F (8°C)	6.2 in	Coldest

Millville has a seasonal temperature swing of 38°F / from 46°F in December to 83°F in July. Total annual precipitation is 41.7 inches, with January being the wettest month (8.0") and July the driest (0.1").

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