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Weather & Climate in Fort Duchesne, UT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Fort Duchesne experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 17°F in January while summers reach 74°F in July. The area gets 322 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 6.0 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 5,128 feet.
Temperature
17°F Jan (-9°C)
74°F Jul (23°C)
| Annual Average | 46.7°F |
| 14% below US avg | |
| January Average | 17°F (-9°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 322 days/yr |
Geography
| Elevation | 5,128 ft (1,563 m) |
| Area | 7.7 sq mi (19.9 km²) |
| Population Density | 53/sq mi |
| Coordinates | 40.2818°N, 109.8772°W |
| Timezone | America/Denver |
| County | Uintah County County |
| Nearest Airport | Vernal Regional (VEL) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 4.0 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 30.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Volcano | No Rating |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
243 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Mar 20, 1995 | 10 km NNW of Rangely, Colorado | M4.5 | 87 km | -3 km |
| Jan 30, 2000 | 8 km ESE of Little America, Wyoming | M4.3 | 136 km | 5 km |
| Mar 7, 2000 | 7 km N of Helper, Utah | M4.2 | 101 km | -3 km |
| May 20, 1995 | 434km E of Wendover, Utah | M4.1 | 78 km | 4 km |
| May 25, 2016 | 15 km NNE of Tabiona, Utah | M4.0 | 70 km | 16 km |
| Apr 7, 1990 | 28 km WNW of Bonanza, Utah | M4.0 | 39 km | 11 km |
| May 1, 2025 | 4 km WNW of Independence, Utah | M3.9 | 121 km | 14 km |
| May 31, 2022 | 37 km ENE of Thompson Springs, Utah | M3.8 | 145 km | 7 km |
| Apr 22, 2017 | 4 km NW of Rangely, Colorado | M3.8 | 90 km | 7 km |
| Feb 6, 1991 | 7 km WNW of Hiawatha, Utah | M3.8 | 134 km | 5 km |
| Feb 5, 1998 | 7 km N of Helper, Utah | M3.8 | 101 km | -2 km |
| Nov 8, 1991 | 17 km WNW of Bonanza, Utah | M3.7 | 49 km | 4 km |
| Mar 2, 1991 | 27 km SSW of Jensen, Utah | M3.7 | 38 km | -3 km |
| Jun 9, 2021 | 17 km E of Independence, Utah | M3.7 | 100 km | 10 km |
| Feb 4, 2012 | 12 km E of Woodland Hills, Utah | M3.6 | 142 km | 13 km |
| Nov 11, 2000 | 14 km SE of Jensen, Utah | M3.6 | 55 km | -3 km |
| Aug 11, 1992 | 4 km N of Sunnyside, Utah | M3.6 | 89 km | 6 km |
| Jan 27, 2006 | 13 km ESE of Castle Dale, Utah | M3.6 | 150 km | 18 km |
| Jun 25, 1994 | 12 km NE of Little America, Wyoming | M3.6 | 148 km | -3 km |
| Jan 21, 1993 | 17 km E of Kenilworth, Utah | M3.6 | 89 km | 1 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
18 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Aug 11, 1993 | EF3 | 38 km | 17.0 mi | 0 |
| Jun 19, 2022 | EF2 | 86 km | 2.1 mi | 0 |
| Aug 26, 2006 | EF1 | 74 km | 8.0 mi | 0 |
| Sep 3, 1999 | EF1 | 32 km | 4.0 mi | 0 |
| Jun 1, 1955 | EF1 | 33 km | 0.1 mi | 0 |
| Jun 16, 2015 | EF0 | 71 km | 1.0 mi | 0 |
| Aug 15, 2009 | EF0 | 77 km | 2.9 mi | 0 |
| Aug 6, 2009 | EF0 | 18 km | 2.2 mi | 0 |
| Aug 6, 2009 | EF0 | 34 km | 0.5 mi | 0 |
| Jun 23, 2005 | EF0 | 59 km | 0.5 mi | 0 |
| Aug 21, 2001 | EF0 | 71 km | 2.0 mi | 0 |
| Jul 30, 1999 | EF0 | 87 km | 0.2 mi | 0 |
| May 5, 1999 | EF0 | 87 km | 1.0 mi | 0 |
| May 5, 1993 | EF0 | 41 km | 0.1 mi | 0 |
| Jul 8, 1990 | EF0 | 11 km | 0.2 mi | 0 |
| Mar 23, 1990 | EF0 | 36 km | 0.2 mi | 0 |
| May 29, 1988 | EF0 | 15 km | 0.2 mi | 0 |
| Sep 11, 1984 | EF0 | 22 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: EAST FORK (106,432 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | EAST FORK | 106,432 | 71 km |
| 2018 | DOLLAR RIDGE | 69,817 | 87 km |
| 2007 | NEOLA NORTH | 46,909 | 33 km |
| 2002 | MUSTANG | 20,607 | 85 km |
| 2012 | WOLF DEN | 19,419 | 88 km |
| 1988 | WHITEROCKS | 18,885 | 28 km |
| 2017 | DEAD DOG | 17,821 | 90 km |
| 2002 | GARDEN VALLEY COMPLEX (EAST FORK) | 14,245 | 97 km |
| 2000 | BUSTERFLAT | 8,501 | 95 km |
| 2020 | RICHARD MTN | 7,802 | 95 km |
| 2012 | CHURCH CAMP | 7,016 | 79 km |
| 1989 | UINTA CANYON | 5,834 | 47 km |
| 1988 | ZENOBIA | 5,468 | 92 km |
| 2005 | NORTH NEOLA | 5,195 | 25 km |
| 2018 | MURDOCK | 5,169 | 94 km |
| 1985 | WEYMAN | 5,058 | 66 km |
| 1996 | L.D.FALLS | 4,697 | 91 km |
| 2002 | COUNTY LINE | 4,298 | 90 km |
| 2010 | MOONWATER POINT | 4,200 | 99 km |
| 2005 | SHEEP CREEK WFU | 4,128 | 65 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-9°C) | 0.5 in | Coldest |
| February | 24°F (-5°C) | 0.5 in | |
| March | 38°F (3°C) | 0.6 in | |
| April | 48°F (9°C) | 0.7 in | |
| May | 57°F (14°C) | 0.9 in | |
| June | 66°F (19°C) | 0.7 in | |
| July | 74°F (23°C) | 0.8 in | Warmest |
| August | 71°F (22°C) | 0.9 in | |
| September | 62°F (16°C) | 0.9 in | |
| October | 49°F (9°C) | 1.0 in | Wettest |
| November | 34°F (1°C) | 0.5 in | |
| December | 22°F (-6°C) | 0.4 in | Driest |
Fort Duchesne has a seasonal temperature swing of 57°F / from 17°F in January to 74°F in July. Total annual precipitation is 8.2 inches, with October being the wettest month (1.0") and December the driest (0.4").