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Weather & Climate in Morongo Valley, CA

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

Morongo Valley enjoys a temperate climate with an average annual temperature of 65°F (18°C). Winters average 50°F in January while summers reach 81°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 9.4 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 2,894 feet.

Temperature

50°F Jan (10°C) 81°F Jul (27°C)
Annual Average64.6°F
20% above US avg
January Average50°F (10°C)
July Average81°F (27°C)
Sunny Days330 days/yr

Geography

Elevation2,894 ft (882 m)
Area25.2 sq mi (65.3 km²)
Population Density155/sq mi
Coordinates34.0724°N, 116.5627°W
TimezoneAmerica/Los_Angeles
CountySan Bernardino County County
Nearest AirportPalm Springs International (PSP)
17 miles away

Precipitation & Snow

Annual Rainfall 9.4"
75% below US avg
Wettest Month (Jan) 2.44"
Driest Month (Jun) 0.08"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskVery High
Risk Score99.8 / 100
Social Vulnerability33.2 / 100
Community Resilience20.1 / 100

Hazard Breakdown

Tornado Relatively Moderate
Hurricane No Rating
Earthquake Very High
Wildfire Very High
Flood Very High
Hail Relatively Moderate
Strong Wind Relatively High
Heat Wave Relatively High
Winter Weather Relatively Low
Lightning Relatively High
Drought Relatively Low
Cold Wave Relatively Low
Landslide Very High
Volcano Very Low
Avalanche Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

12,737 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.3.

Jun 28, 1992 The 1992 Landers, California Earthquake M7.3 18 km 0 km
Oct 16, 1999 The 1999 Hector Mine, California Earthquake M7.1 65 km 14 km
Jun 28, 1992 The 1992 Big Bear, California Earthquake M6.3 28 km 4 km
Apr 23, 1992 The 1992 Joshua Tree, California Earthquake M6.1 26 km 12 km
Jun 28, 1991 The 1991 Sierra Madre, California Earthquake M5.8 133 km 8 km
Oct 16, 1999 13km WSW of Ludlow, CA M5.8 72 km 14 km
Jun 28, 1992 3km NE of Yucca Valley, California M5.8 16 km -1 km
Jun 28, 1992 2km SSW of Joshua Tree, California M5.7 23 km 6 km
Jun 29, 1992 3km ESE of Yucca Valley, California M5.7 15 km 10 km
Oct 16, 1999 7km ENE of Running Springs, CA M5.6 48 km 6 km
Jun 28, 1992 11km SSE of Big Bear Lake, California M5.5 28 km 10 km
Feb 28, 1990 The 1990 Upland, California Earthquake M5.5 105 km 3 km
Jun 28, 1992 0km E of Yucca Valley, CA M5.5 13 km 8 km
Jul 5, 1992 21km SW of Ludlow, California M5.4 61 km 5 km
Jul 7, 2010 20km NNW of Borrego Springs, CA M5.4 73 km 12 km
Jun 28, 1992 26km NNW of Yucca Valley, CA M5.4 30 km 4 km
Oct 16, 1999 32km SSW of Ludlow, California M5.4 50 km 1 km
Jul 1, 1992 24km N of Yucca Valley, California M5.3 30 km 5 km
Aug 26, 2012 5km NNW of Brawley, CA M5.3 150 km 8 km
Nov 27, 1992 10km NNW of Big Bear City, California M5.3 43 km 0 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

47 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 13 injuries.

Date Rating Distance Path Fatalities
Feb 9, 1978 EF3 85 km 2.0 mi 0
May 22, 2008 EF2 67 km 2.8 mi 0
Sep 7, 1982 EF2 25 km 0.5 mi 0
Jun 25, 1954 EF2 85 km 0.1 mi 0
Aug 6, 2015 EF1 70 km 4.0 mi 0
Aug 4, 2008 EF1 31 km 1.1 mi 0
Feb 19, 2005 EF1 87 km 2.8 mi 0
May 18, 1997 EF1 87 km 3.5 mi 0
May 18, 1997 EF1 82 km 9.0 mi 0
May 11, 1997 EF1 77 km 0.2 mi 0
Dec 22, 1996 EF1 26 km 0.1 mi 0
Oct 22, 1974 EF1 21 km 0.1 mi 0
Jul 20, 1974 EF1 51 km 1.0 mi 0
Oct 8, 2022 EF0 73 km 1.6 mi 0
Aug 16, 2018 EF0 58 km 0.2 mi 0
May 7, 2017 EF0 96 km 0.0 mi 0
Oct 17, 2015 EF0 67 km 0.0 mi 0
Jul 19, 2015 EF0 29 km 0.2 mi 0
Sep 9, 2012 EF0 70 km 0.0 mi 0
Aug 12, 2012 EF0 68 km 0.5 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

1 tsunami recorded within 500 km.

Year Location Cause Max Wave Deaths Distance
1855 S. CALIFORNIA Eruption + Earthquake — — 142 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Salton Buttes (131 km).

Name Type Elevation Last Eruption Distance
Salton Buttes Lava dome(s) -40 m (-131 ft) 210 131 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: OLD (90,180 acres, 2003).

Year Name Acres Burned Distance
2003 OLD 90,180 69 km
2006 MILLARD 86,585 7 km
1999 WILLOW 63,525 58 km
2003 GRAND PRIX 50,799 85 km
2007 POOMACHA 47,496 92 km
2006 ESPERANZA 40,566 38 km
2016 BLUE CUT 36,856 91 km
2020 APPLE 32,374 28 km
2015 LAKE 30,421 20 km
2022 FAIRVIEW 28,680 53 km
2013 MOUNTAIN 28,202 38 km
1998 EDNA 27,561 44 km
1993 CALIFORNIA 23,899 65 km
2018 HOLY 22,845 93 km
2020 EL DORADO 22,300 36 km
1995 VERBENIA 21,601 13 km
1994 PALM 21,040 48 km
2013 SILVER 20,863 31 km
2003 COYOTE 19,215 76 km
2004 CERRITO 18,605 83 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 50°F (10°C) 2.4 in Wettest
February 49°F (9°C) 2.3 in
March 51°F (11°C) 2.1 in
April 57°F (14°C) 0.9 in
May 64°F (18°C) 0.4 in
June 73°F (23°C) 0.1 in Driest
July 81°F (27°C) 0.4 in Warmest
August 78°F (26°C) 0.8 in
September 73°F (23°C) 0.8 in
October 64°F (18°C) 0.6 in
November 54°F (12°C) 1.5 in
December 48°F (9°C) 2.1 in Coldest

Morongo Valley has a seasonal temperature swing of 34°F / from 48°F in December to 81°F in July. Total annual precipitation is 14.5 inches, with January being the wettest month (2.4") and June the driest (0.1").

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