Weather & Climate in Lewiston, CA

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

Lewiston enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 41°F in January while summers reach 75°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 32.4 inches. The area receives 6.4 inches of snow annually. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 2,140 feet.

Temperature

41°F Jan (5°C) 75°F Jul (24°C)

Annual Average	56.2°F
	4% above US avg
January Average	41°F (5°C)
July Average	75°F (24°C)
Sunny Days	275 days/yr

Geography

Elevation	2,140 ft (652 m)
Area	20.0 sq mi (51.8 km²)
Population Density	122/sq mi
Coordinates	40.6969°N, 122.8225°W
Timezone	America/Los_Angeles
County	Shasta County County
Nearest Airport	Redding Regional (RDD) 31 miles away

Precipitation & Snow

Annual Rainfall 32.4"

15% below US avg

Snowfall 6.4"

Wettest Month (Jan) 7.01"

Driest Month (Jul) 0.24"

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

3,417 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.2.

Apr 25, 1992	The 1992 Petrolia, California Earthquake	M7.2	126 km	10 km
Aug 17, 1991	30 km SSW of Scotia, California	M6.0	133 km	8 km
Feb 13, 2012	26 km NNW of Willow Creek, California	M5.6	95 km	27 km
Jan 22, 1997	33 km SW of Scotia, California	M5.6	140 km	23 km
Jun 23, 2019	6km SSW of Petrolia, CA	M5.6	134 km	9 km
Jan 16, 1990	30 km NW of Shelter Cove, California	M5.4	135 km	4 km
Dec 26, 1994	7 km WNW of Fields Landing, California	M5.4	125 km	23 km
Apr 30, 2008	3 km NNW of Burnt Ranch, California	M5.4	59 km	28 km
Jan 1, 2023	15km SE of Rio Dell, CA	M5.4	102 km	31 km
Mar 8, 1992	27 km NW of Shelter Cove, California	M5.3	132 km	9 km
Mar 18, 2020	15km W of Petrolia, CA	M5.2	143 km	29 km
Jun 17, 2002	29 km WNW of Fields Landing, California	M5.2	146 km	17 km
Jan 26, 1997	33 km SW of Scotia, California	M5.2	141 km	22 km
Jul 18, 2021	12km W of Petrolia, CA	M5.1	142 km	31 km
Nov 26, 1998	7km NW of Redding, CA	M5.1	35 km	25 km
Jul 19, 2006	35 km SSW of Ferndale, California	M5.0	144 km	20 km
Sep 8, 2023	12 km NE of Burney, CA	M5.0	110 km	16 km
Jun 19, 1994	29 km SW of Ferndale, California	M4.9	144 km	19 km
Jan 18, 1990	27 km ESE of Orick, California	M4.9	95 km	35 km
Jun 5, 1992	31 km SSW of Ferndale, California	M4.9	141 km	20 km

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

Tornado History

8 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.

Date	Rating	Distance	Path	Fatalities
May 9, 1980	EF2	81 km	0.1 mi	0
Mar 5, 1978	EF1	82 km	0.1 mi	0
Jan 4, 2021	EF0	92 km	0.8 mi	0
Apr 4, 2013	EF0	79 km	0.8 mi	0
Feb 19, 2013	EF0	92 km	0.5 mi	0
Mar 14, 1987	EF0	94 km	0.2 mi	0
Mar 5, 1978	EF0	95 km	0.1 mi	0
Mar 5, 1978	EF0	69 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: 1.8 m (6 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1992	CAPE MENDOCINO, N. CALIFORNIA	Earthquake	1.8 m	—	131 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Shasta (95 km).

Name	Type	Elevation	Last Eruption	Distance
Shasta	Stratovolcano	4,317 m (14,163 ft)	1250	95 km
Lassen Volcanic Center	Stratovolcano	3,187 m (10,456 ft)	1917	113 km
Medicine Lake	Shield	2,412 m (7,913 ft)	1060	147 km
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	192 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	86 km
2018	CARR	233,710	20 km
2021	MONUMENT	226,125	37 km
2021	HAYPRESS	204,549	49 km
2020	RED SALMON COMPLEX	147,535	68 km
1999	MEGRAM- ORLEANS	125,337	63 km
2021	MCFARLAND	121,554	47 km
2006	PIGEON	100,962	43 km
2008	YOLLA BOLLY COMPLEX (IRON)	94,888	68 km
2015	RIVER COMPLEX	78,531	52 km
2018	DELTA	63,732	46 km
2017	ISLAND	62,931	85 km
1992	FOUNTAIN	62,340	83 km
2020	ZOGG	56,941	35 km
1987	YELLOW 2	53,626	90 km
2012	BAGLEY	47,731	75 km
2018	HIRZ	46,700	56 km
2012	NORTH PASS	43,689	91 km
2008	BEAR WALLOW COMPLEX (UKONOM)	40,029	83 km
2008	SHU LIGHTNING COMPLEX (MOON)	36,514	22 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	41°F (5°C)	7.0 in	Wettest
February	41°F (5°C)	5.7 in
March	44°F (7°C)	5.5 in
April	48°F (9°C)	2.5 in
May	56°F (13°C)	1.3 in
June	63°F (17°C)	0.7 in
July	75°F (24°C)	0.2 in	Warmest, Driest
August	69°F (21°C)	0.5 in
September	64°F (18°C)	1.1 in
October	55°F (13°C)	2.6 in
November	44°F (6°C)	6.2 in
December	38°F (3°C)	6.6 in	Coldest

Lewiston has a seasonal temperature swing of 37°F / from 38°F in December to 75°F in July. Total annual precipitation is 40.0 inches, with January being the wettest month (7.0") and July the driest (0.2").

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