Weather & Climate in Green Valley CDP (Los Angeles County), CA

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

Green Valley CDP (Los Angeles County) enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 47°F in January while summers reach 80°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 15.8 inches (drier than the 38-inch national average). The area receives 1.3 inches of snow annually. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 2,982 feet.

Temperature

47°F Jan (8°C) 80°F Jul (27°C)

Annual Average	62.0°F
	15% above US avg
January Average	47°F (8°C)
July Average	80°F (27°C)
Sunny Days	330 days/yr

Geography

Elevation	2,982 ft (909 m)
Area	12.8 sq mi (33.2 km²)
Population Density	63/sq mi
Coordinates	34.6174°N, 118.4050°W
Timezone	America/Los_Angeles
County	Los Angeles County County
Nearest Airport	Bob Hope (BUR) 29 miles away

Precipitation & Snow

Annual Rainfall 15.8"

58% below US avg

Snowfall 1.3"

Wettest Month (Feb) 3.15"

Driest Month (Jul) 0.04"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very High
Risk Score	100.0 / 100
Social Vulnerability	55.4 / 100
Community Resilience	13.6 / 100

Hazard Breakdown

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

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

Earthquake History

7,961 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.1.

Jul 6, 2019	Ridgecrest Earthquake Sequence	M7.1	148 km	8 km
Jan 17, 1994	Northridge, California, earthquake	M6.7	47 km	18 km
Jul 4, 2019	Ridgecrest Earthquake Sequence	M6.4	146 km	11 km
Jan 17, 1994	1km ENE of Granada Hills, California	M5.9	39 km	5 km
Jun 28, 1991	The 1991 Sierra Madre, California Earthquake	M5.8	54 km	8 km
Sep 20, 1995	16km NNE of Ridgecrest, California	M5.8	145 km	5 km
Jul 11, 1992	12km NW of California City, California	M5.7	73 km	10 km
Oct 16, 1999	7km ENE of Running Springs, CA	M5.6	132 km	6 km
Jan 17, 1994	7km NNE of Simi Valley, California	M5.6	42 km	9 km
Jun 4, 2020	17km S of Searles Valley, CA	M5.5	142 km	8 km
Feb 28, 1990	The 1990 Upland, California Earthquake	M5.5	84 km	3 km
Jul 5, 2019	16km W of Searles Valley, CA	M5.4	148 km	7 km
Aug 17, 1995	17km N of Ridgecrest, California	M5.4	145 km	5 km
Nov 27, 1992	10km NNW of Big Bear City, California	M5.3	141 km	0 km
Jun 28, 1992	1km N of Big Bear Lake, California	M5.3	143 km	7 km
Dec 4, 1992	10km SE of Lucerne Valley, California	M5.3	141 km	1 km
Mar 20, 1994	3km WNW of Panorama City, California	M5.2	43 km	12 km
Jan 18, 1994	10km ESE of Piru, California	M5.2	38 km	11 km
Aug 17, 1992	7km SE of Big Bear Lake, California	M5.2	149 km	9 km
Aug 7, 2024	24 km SW of Lamont, CA	M5.2	84 km	12 km

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

Tornado History

75 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 50 injuries.

Date	Rating	Distance	Path	Fatalities
Mar 1, 1983	EF2	71 km	3.5 mi	0
Nov 9, 1982	EF2	95 km	10.0 mi	0
Nov 9, 1982	EF2	49 km	1.0 mi	0
Nov 7, 1966	EF2	80 km	0.1 mi	0
Nov 7, 1966	EF2	86 km	10.3 mi	0
Mar 22, 2023	EF1	74 km	0.5 mi	0
Jan 9, 1998	EF1	96 km	1.5 mi	0
Jan 14, 1993	EF1	92 km	1.0 mi	0
Dec 7, 1992	EF1	98 km	0.1 mi	0
Mar 20, 1992	EF1	61 km	0.2 mi	0
Mar 16, 1986	EF1	98 km	1.2 mi	0
Oct 1, 1983	EF1	78 km	0.3 mi	0
Nov 9, 1982	EF1	70 km	0.2 mi	0
Mar 29, 1982	EF1	66 km	2.0 mi	0
Jan 31, 1979	EF1	50 km	0.1 mi	0
May 8, 1977	EF1	95 km	0.1 mi	0
Mar 16, 1977	EF1	93 km	10.9 mi	0
Sep 4, 1976	EF1	74 km	0.1 mi	0
Nov 25, 1965	EF1	80 km	2.0 mi	0
Nov 9, 1964	EF1	76 km	1.0 mi	0

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

Tsunami History

4 tsunamis recorded within 500 km. Highest wave on record: 3.4 m (11 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1812	S. CALIFORNIA	Eruption + Earthquake	3.4 m	1	145 km
1930	S. CALIFORNIA	Eruption + Earthquake	3.1 m	1	69 km
1994	WEST COAST, USA	Earthquake	0.1 m	57	47 km
1855	S. CALIFORNIA	Eruption + Earthquake	—	—	64 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Golden Trout Creek (194 km).

Name	Type	Elevation	Last Eruption	Distance
Golden Trout Creek	Volcanic field	2,886 m (9,469 ft)	-5550	194 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: THOMAS (281,982 acres, 2017).

Year	Name	Acres Burned	Distance
2017	THOMAS	281,982	84 km
2009	STATION	165,368	41 km
2006	DAY	159,713	52 km
1985	WHEELER 2	126,854	88 km
2020	BOBCAT	115,728	54 km
2003	SIMI	107,756	47 km
2018	WOOLSEY	97,962	67 km
2003	PIRU	63,920	45 km
2003	GRAND PRIX	50,799	98 km
1985	FERNDALE	46,724	72 km
2016	SAND	41,561	26 km
2007	BUCKWEED	41,332	12 km
1993	GREEN MEADOWS	38,115	77 km
2002	WILLIAMS	37,505	74 km
2007	RANCH	37,009	32 km
2016	BLUE CUT	36,856	89 km
2008	PIUTE	36,251	98 km
2013	POWERHOUSE	32,329	7 km
2020	LAKE	30,971	16 km
2008	FREEWAY COMPLEX	29,350	98 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	47°F (8°C)	3.0 in	Coldest
February	48°F (9°C)	3.2 in	Wettest
March	50°F (10°C)	2.6 in
April	55°F (13°C)	1.0 in
May	61°F (16°C)	0.3 in
June	69°F (21°C)	0.1 in
July	80°F (27°C)	0.0 in	Warmest, Driest
August	76°F (25°C)	0.2 in
September	71°F (22°C)	0.3 in
October	63°F (17°C)	0.4 in
November	53°F (12°C)	1.8 in
December	47°F (8°C)	2.2 in

Green Valley CDP (Los Angeles County) has a seasonal temperature swing of 33°F / from 47°F in January to 80°F in July. Total annual precipitation is 15.0 inches, with February being the wettest month (3.2") and July the driest (0.0").

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