All Countries
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 Average | 68.0°F |
| 26% above US avg | |
| January Average | 49°F (9°C) |
| July Average | 90°F (32°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 2,463 ft (751 m) |
| Area | 7.0 sq mi (18.1 km²) |
| Population Density | 1,261/sq mi |
| Coordinates | 35.2477°N, 116.6834°W |
| Timezone | America/Los_Angeles |
| County | San Bernardino County County |
| Nearest Airport | San Bernardino International (SBD) 86 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 99.8 / 100 |
| Social Vulnerability | 33.2 / 100 |
| Community Resilience | 20.1 / 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").