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Weather & Climate in Westmorland, CA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Westmorland has a warm climate with an average annual temperature of 74°F (23°C). Winters average 57°F in January while summers reach 92°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 2.4 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 -164 feet.
Temperature
57°F Jan (14°C)
92°F Jul (34°C)
| Annual Average | 73.8°F |
| 37% above US avg | |
| January Average | 57°F (14°C) |
| July Average | 92°F (34°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | -164 ft (-50 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 2,843/sq mi |
| Coordinates | 33.0390°N, 115.6224°W |
| Timezone | America/Los_Angeles |
| County | Imperial County County |
| Nearest Airport | Calexico International (CXL) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 96.5 / 100 |
| Social Vulnerability | 85.2 / 100 |
| Community Resilience | 2.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Very Low |
| Earthquake | Relatively High |
| Wildfire | Relatively Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | No Rating |
| Landslide | Very Low |
| Volcano | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
13,265 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.3.
| Jun 28, 1992 | The 1992 Landers, California Earthquake | M7.3 | 150 km | 0 km |
| Apr 4, 2010 | The 2010 Sierra El Mayor, B.C., Mexico Earthquake | M7.2 | 89 km | 10 km |
| Apr 23, 1992 | The 1992 Joshua Tree, California Earthquake | M6.1 | 121 km | 12 km |
| Dec 30, 2009 | 12km N of Delta, B.C., MX | M5.8 | 76 km | 6 km |
| Jun 28, 1992 | 3km NE of Yucca Valley, California | M5.8 | 142 km | -1 km |
| Jun 15, 2010 | 8km ESE of Ocotillo, CA | M5.7 | 46 km | 9 km |
| Dec 8, 2001 | 22km S of Estacion Coahuila, B.C., MX | M5.7 | 130 km | 7 km |
| Apr 4, 2010 | 12km SSW of Estacion Coahuila, B.C., MX | M5.7 | 118 km | 10 km |
| Jun 28, 1992 | 2km SSW of Joshua Tree, California | M5.7 | 137 km | 6 km |
| Feb 22, 2002 | 13km WSW of Delta, B.C., MX | M5.7 | 85 km | 7 km |
| Jun 29, 1992 | 3km ESE of Yucca Valley, California | M5.7 | 139 km | 10 km |
| Jun 28, 1992 | 0km E of Yucca Valley, CA | M5.5 | 141 km | 8 km |
| Apr 4, 2010 | 9km SW of Delta, B.C., MX | M5.4 | 89 km | 10 km |
| Jul 7, 2010 | 20km NNW of Borrego Springs, CA | M5.4 | 90 km | 12 km |
| Aug 26, 2012 | 4km NNW of Brawley, CA | M5.4 | 8 km | 8 km |
| Apr 4, 2010 | 12km WNW of Alberto Oviedo Mota, B.C., MX | M5.4 | 91 km | 10 km |
| May 24, 2006 | 6km SSW of Delta, B.C., MX | M5.4 | 89 km | 6 km |
| Dec 3, 1991 | 71km E of Maneadero, B.C., MX | M5.3 | 144 km | 6 km |
| Aug 26, 2012 | 5km NNW of Brawley, CA | M5.3 | 7 km | 8 km |
| Apr 8, 2010 | 12km SW of Alberto Oviedo Mota, B.C., MX | M5.3 | 103 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
15 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 8 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Feb 9, 1978 | EF3 | 72 km | 2.0 mi | 0 |
| Aug 6, 2015 | EF1 | 74 km | 4.0 mi | 0 |
| Aug 29, 1993 | EF1 | 22 km | 0.1 mi | 0 |
| Sep 13, 1966 | EF1 | 96 km | 0.1 mi | 0 |
| Jul 5, 1965 | EF1 | 99 km | 2.0 mi | 0 |
| Apr 21, 2015 | EF0 | 87 km | 10.0 mi | 0 |
| Jan 21, 2010 | EF0 | 97 km | 14.3 mi | 0 |
| Aug 30, 2000 | EF0 | 52 km | 3.0 mi | 0 |
| Jul 12, 1999 | EF0 | 80 km | 0.1 mi | 0 |
| Sep 24, 1997 | EF0 | 29 km | 1.5 mi | 0 |
| May 20, 1997 | EF0 | 65 km | 0.1 mi | 0 |
| May 5, 1992 | EF0 | 22 km | 0.2 mi | 0 |
| Sep 18, 1985 | EF0 | 61 km | 0.1 mi | 0 |
| Jun 7, 1972 | EF0 | 61 km | 0.1 mi | 0 |
| Jul 5, 1965 | EF0 | 79 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
1 volcano within 200 km. Closest: Salton Buttes (18 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Salton Buttes | Lava dome(s) | -40 m (-131 ft) | 210 | 18 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: PINES (65,407 acres, 2002).
| Year | Name | Acres Burned | Distance |
| 2002 | PINES | 65,407 | 89 km |
| 2003 | COYOTE | 19,215 | 97 km |
| 2006 | HORSE | 16,659 | 100 km |
| 2011 | EAGLE | 14,743 | 85 km |
| 2012 | WILSON | 12,048 | 80 km |
| 2012 | STEWART | 9,501 | 82 km |
| 2004 | MATAGUAY | 9,087 | 98 km |
| 2013 | CHARIOT | 7,250 | 79 km |
| 1995 | BUTTERFIELD | 7,165 | 76 km |
| 2021 | SOUTHERN | 5,525 | 79 km |
| 2012 | BANNER | 5,371 | 77 km |
| 2012 | BORDER 6 | 5,301 | 79 km |
| 2007 | INKOPAH | 5,037 | 63 km |
| 1990 | MORRETTIS | 4,718 | 98 km |
| 2006 | CIBOLA | 4,703 | 91 km |
| 1989 | THING 2 | 4,650 | 74 km |
| 1999 | LAGUNA 100 | 4,586 | 75 km |
| 2011 | THREE SLASHES | 4,581 | 90 km |
| 1999 | SHOCKEY | 3,522 | 88 km |
| 2013 | FELIPE | 2,961 | 86 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 57°F (14°C) | 0.5 in | Wettest |
| February | 59°F (15°C) | 0.4 in | |
| March | 64°F (18°C) | 0.4 in | |
| April | 70°F (21°C) | 0.1 in | |
| May | 77°F (25°C) | 0.0 in | |
| June | 85°F (29°C) | 0.0 in | Driest |
| July | 92°F (34°C) | 0.1 in | Warmest |
| August | 90°F (32°C) | 0.4 in | |
| September | 85°F (30°C) | 0.3 in | |
| October | 75°F (24°C) | 0.2 in | |
| November | 62°F (17°C) | 0.2 in | |
| December | 55°F (13°C) | 0.4 in | Coldest |
Westmorland has a seasonal temperature swing of 38°F / from 55°F in December to 92°F in July. Total annual precipitation is 2.8 inches, with January being the wettest month (0.5") and June the driest (0.0").