Weather & Climate in Calimesa, CA

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

Calimesa enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 52°F in January while summers reach 78°F in July. Annual precipitation totals 10.7 inches (drier than the 38-inch national average). Air quality is rated Moderate with a median AQI of 54. 33% of days have good air quality. The city sits at an elevation of 2,370 feet.

Temperature

52°F Jan (11°C) 78°F Jul (26°C)
Annual Average63.3°F
17% above US avg
January Average52°F (11°C)
July Average78°F (26°C)

Geography

Elevation2,370 ft (722 m)
Area14.9 sq mi (38.6 km²)
Population Density717/sq mi
Coordinates33.9874°N, 117.0542°W
TimezoneAmerica/Los_Angeles
CountyOrange County County
Nearest AirportSan Bernardino International (SBD)
13 miles away

Precipitation & Snow

Annual Rainfall 10.7"
72% below US avg
Snowfall 0.0"
Wettest Month (Feb) 2.43"
Driest Month (Jun) 0.07"

Air Quality

AQI Median54.0
RatingModerate
Good Days %32.5%
Unhealthy Days16

Natural Hazard Risk

Overall RiskVery High
Risk Score99.8 / 100
Social Vulnerability24.9 / 100
Community Resilience16.3 / 100

Hazard Breakdown

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

Earthquake History

13,454 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.3.

Jun 28, 1992 The 1992 Landers, California Earthquake M7.3 62 km 0 km
Oct 16, 1999 The 1999 Hector Mine, California Earthquake M7.1 100 km 14 km
Jan 17, 1994 Northridge, California, earthquake M6.7 139 km 18 km
Jun 28, 1992 The 1992 Big Bear, California Earthquake M6.3 32 km 4 km
Apr 23, 1992 The 1992 Joshua Tree, California Earthquake M6.1 68 km 12 km
Jan 17, 1994 1km ENE of Granada Hills, California M5.9 136 km 5 km
Jun 28, 1991 The 1991 Sierra Madre, California Earthquake M5.8 92 km 8 km
Oct 16, 1999 13km WSW of Ludlow, CA M5.8 104 km 14 km
Jun 28, 1992 3km NE of Yucca Valley, California M5.8 62 km -1 km
Jun 28, 1992 2km SSW of Joshua Tree, California M5.7 69 km 6 km
Jun 29, 1992 3km ESE of Yucca Valley, California M5.7 61 km 10 km
Oct 16, 1999 7km ENE of Running Springs, CA M5.6 28 km 6 km
Jun 28, 1992 11km SSE of Big Bear Lake, California M5.5 27 km 10 km
Feb 28, 1990 The 1990 Upland, California Earthquake M5.5 62 km 3 km
Jun 28, 1992 0km E of Yucca Valley, CA M5.5 60 km 8 km
Jul 5, 1992 21km SW of Ludlow, California M5.4 94 km 5 km
Jul 7, 2010 20km NNW of Borrego Springs, CA M5.4 83 km 12 km
Jun 28, 1992 26km NNW of Yucca Valley, CA M5.4 64 km 4 km
Oct 16, 1999 32km SSW of Ludlow, California M5.4 89 km 1 km
Jul 1, 1992 24km N of Yucca Valley, California M5.3 66 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Tornado History

102 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 18 injuries.

Date Rating Distance Path Fatalities
May 22, 2008 EF2 22 km 2.8 mi 0
Sep 7, 1982 EF2 69 km 0.5 mi 0
Nov 7, 1966 EF2 88 km 0.2 mi 0
Jun 25, 1954 EF2 73 km 0.1 mi 0
Mar 22, 2023 EF1 99 km 0.5 mi 0
Aug 6, 2015 EF1 99 km 4.0 mi 0
Aug 4, 2008 EF1 59 km 1.1 mi 0
Feb 19, 2005 EF1 57 km 2.8 mi 0
Dec 21, 1997 EF1 94 km 1.0 mi 0
Nov 11, 1997 EF1 79 km 0.2 mi 0
May 18, 1997 EF1 73 km 3.5 mi 0
May 18, 1997 EF1 69 km 9.0 mi 0
May 11, 1997 EF1 61 km 0.2 mi 0
Dec 22, 1996 EF1 26 km 0.1 mi 0
Jan 14, 1993 EF1 84 km 1.0 mi 0
Dec 7, 1992 EF1 91 km 0.1 mi 0
Dec 7, 1992 EF1 82 km 0.1 mi 0
Mar 27, 1991 EF1 94 km 3.0 mi 0
Mar 27, 1991 EF1 94 km 0.2 mi 0
Mar 16, 1986 EF1 82 km 1.2 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Tsunami History

4 tsunamis recorded within 500 km. Highest wave on record: 3.1 m (10 ft).

Year Location Cause Max Wave Deaths Distance
1930 S. CALIFORNIA Eruption + Earthquake 3.1 m 1 147 km
1862 S. CALIFORNIA Eruption + Earthquake 1.2 m - 144 km
1994 WEST COAST, USA Earthquake 0.1 m 57 139 km
1855 S. CALIFORNIA Eruption + Earthquake - - 97 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Salton Buttes (160 km).

Name Type Elevation Last Eruption Distance
Salton Buttes Lava dome(s) -40 m (-131 ft) 210 160 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: BOBCAT (115,728 acres, 2020).

Year Name Acres Burned Distance
2020 BOBCAT 115,728 89 km
2003 OLD 90,180 36 km
2006 MILLARD 86,585 42 km
1999 WILLOW 63,525 40 km
2003 PARADISE 55,995 88 km
2003 GRAND PRIX 50,799 44 km
2007 POOMACHA 47,496 77 km
2006 ESPERANZA 40,566 21 km
2002 WILLIAMS 37,505 70 km
2016 BLUE CUT 36,856 56 km
2008 YELLOW 33,232 76 km
2020 APPLE 32,374 18 km
2015 LAKE 30,421 32 km
2008 FREEWAY COMPLEX 29,350 65 km
2022 FAIRVIEW 28,680 39 km
2013 MOUNTAIN 28,202 48 km
2007 SANTIAGO 27,605 63 km
1998 EDNA 27,561 12 km
2020 INDIA 24,193 73 km
1993 CALIFORNIA 23,899 39 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 52°F (11°C) 2.1 in
February 52°F (11°C) 2.4 in Wettest
March 56°F (13°C) 1.5 in
April 59°F (15°C) 0.8 in
May 65°F (19°C) 0.3 in
June 71°F (22°C) 0.1 in Driest
July 78°F (26°C) 0.1 in
August 78°F (26°C) 0.4 in Warmest
September 75°F (24°C) 0.2 in
October 66°F (19°C) 0.5 in
November 57°F (14°C) 0.7 in
December 51°F (11°C) 1.8 in Coldest

Calimesa has a seasonal temperature swing of 27°F / from 51°F in December to 78°F in August. Total annual precipitation is 10.7 inches, with February being the wettest month (2.4") and June the driest (0.1").

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