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Weather & Climate in Fort Irwin, CA

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

Fort Irwin enjoys a temperate climate with an average annual temperature of 68°F (20°C). Winters average 49°F in January while summers reach 90°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 3.8 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 2,463 feet.

Temperature

49°F Jan (9°C) 90°F Jul (32°C)
Annual Average68.0°F
26% above US avg
January Average49°F (9°C)
July Average90°F (32°C)
Sunny Days330 days/yr

Geography

Elevation2,463 ft (751 m)
Area7.0 sq mi (18.1 km²)
Population Density1,261/sq mi
Coordinates35.2477°N, 116.6834°W
TimezoneAmerica/Los_Angeles
CountySan Bernardino County County
Nearest AirportSan Bernardino International (SBD)
86 miles away

Precipitation & Snow

Annual Rainfall 3.8"
90% below US avg
Snowfall 0.2"
Wettest Month (Jan) 0.79"
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

14,528 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.3.

Jun 28, 1992 The 1992 Landers, California Earthquake M7.3 119 km 0 km
Oct 16, 1999 The 1999 Hector Mine, California Earthquake M7.1 81 km 14 km
Jul 6, 2019 Ridgecrest Earthquake Sequence M7.1 101 km 8 km
Jul 4, 2019 Ridgecrest Earthquake Sequence M6.4 90 km 11 km
Jun 28, 1992 The 1992 Big Bear, California Earthquake M6.3 117 km 4 km
Apr 23, 1992 The 1992 Joshua Tree, California Earthquake M6.1 147 km 12 km
Jun 28, 1992 3km NE of Yucca Valley, California M5.8 127 km -1 km
Oct 16, 1999 13km WSW of Ludlow, CA M5.8 73 km 14 km
Sep 20, 1995 16km NNE of Ridgecrest, California M5.8 104 km 5 km
Jun 28, 1992 2km SSW of Joshua Tree, California M5.7 130 km 6 km
Jun 29, 1992 3km ESE of Yucca Valley, California M5.7 130 km 10 km
Jul 11, 1992 12km NW of California City, California M5.7 126 km 10 km
Oct 16, 1999 7km ENE of Running Springs, CA M5.6 117 km 6 km
Jun 28, 1992 11km SSE of Big Bear Lake, California M5.5 122 km 10 km
Jun 4, 2020 17km S of Searles Valley, CA M5.5 79 km 8 km
Jul 6, 2019 15km ESE of Little Lake, CA M5.5 121 km 5 km
Jun 28, 1992 0km E of Yucca Valley, CA M5.5 128 km 8 km
Jul 6, 2019 20km E of Little Lake, CA M5.4 117 km 7 km
Jul 5, 1992 21km SW of Ludlow, California M5.4 81 km 5 km
Jun 28, 1992 26km NNW of Yucca Valley, CA M5.4 102 km 4 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
Jun 25, 1954 EF2 83 km 0.1 mi 0
May 18, 1997 EF1 85 km 9.0 mi 0
May 18, 1997 EF1 85 km 3.5 mi 0
May 11, 1997 EF1 94 km 0.2 mi 0
Apr 16, 2019 EF0 96 km 1.6 mi 0
May 7, 2017 EF0 94 km 0.0 mi 0
Aug 18, 2013 EF0 80 km 1.0 mi 0
Mar 26, 1991 EF0 100 km 0.1 mi 0
Sep 29, 1990 EF0 48 km 0.2 mi 0
Aug 14, 1990 EF0 47 km 0.1 mi 0
Jul 21, 1986 EF0 67 km 0.2 mi 0
Sep 5, 1976 EF0 98 km 0.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

1 volcano within 200 km. Closest: Golden Trout Creek (192 km).

Name Type Elevation Last Eruption Distance
Golden Trout Creek Volcanic field 2,886 m (9,469 ft) -5550 192 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

18 wildfires (100+ acres) recorded within 100 km. Largest: DOME (43,628 acres, 2020).

Year Name Acres Burned Distance
2020 DOME 43,628 100 km
2006 CALICO 9,274 86 km
1993 OPAL 2 8,223 43 km
2000 HAPPY 5,987 97 km
1986 NSCRIPTION 4,710 42 km
2005 KINGSTON 3,739 93 km
2021 MOJAVE 2,499 84 km
1993 STODDARD 4 2,493 73 km
2005 RANGE 2,473 9 km
1984 STODDARD 2 2,458 71 km
2007 GOLDEN 2,062 87 km
2011 WELLS 1,841 83 km
2006 BUTTE 2 1,766 88 km
1994 OPAL 2 1,458 40 km
1996 UNNAMED 1,075 61 km
1995 UNNAMED 1,068 30 km
1996 BARSTOW 1,060 81 km
2005 HALLORAN 1,044 84 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 49°F (9°C) 0.8 in Wettest
February 49°F (10°C) 0.8 in
March 53°F (12°C) 0.7 in
April 60°F (16°C) 0.3 in
May 69°F (20°C) 0.2 in
June 78°F (26°C) 0.1 in Driest
July 90°F (32°C) 0.3 in Warmest
August 84°F (29°C) 0.6 in
September 77°F (25°C) 0.3 in
October 66°F (19°C) 0.3 in
November 53°F (12°C) 0.4 in
December 45°F (7°C) 0.6 in Coldest

Fort Irwin has a seasonal temperature swing of 44°F / from 45°F in December to 90°F in July. Total annual precipitation is 5.3 inches, with January being the wettest month (0.8") and June the driest (0.1").

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