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Weather & Climate in Green River, UT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Green River experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 28°F in January while summers reach 81°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 6.7 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 4,099 feet.
Temperature
28°F Jan (-2°C)
81°F Jul (27°C)
| Annual Average | 54.0°F |
| 0% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 4,099 ft (1,249 m) |
| Area | 12.6 sq mi (32.6 km²) |
| Population Density | 30/sq mi |
| Coordinates | 38.9935°N, 110.1734°W |
| Timezone | America/Denver |
| County | Wayne County County |
| Nearest Airport | Canyonlands Regional (CNY) 28 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 1.9 / 100 |
| Social Vulnerability | 47.3 / 100 |
| Community Resilience | 36.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
488 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Mar 4, 2019 | 29 km E of La Sal, Utah | M4.5 | 135 km | 1 km |
| May 27, 2000 | 29 km WNW of Naturita, Colorado | M4.4 | 137 km | 10 km |
| Jun 24, 1992 | 30 km WSW of Emery, Utah | M4.3 | 122 km | 5 km |
| Jul 19, 2001 | 31 km NNE of Fremont, Utah | M4.2 | 122 km | 7 km |
| Mar 7, 2000 | 7 km N of Helper, Utah | M4.2 | 102 km | -3 km |
| Jun 29, 2014 | 6 km SE of Spring City, Utah | M4.2 | 120 km | 9 km |
| Apr 7, 1990 | 28 km WNW of Bonanza, Utah | M4.0 | 136 km | 11 km |
| Jan 6, 1996 | 15 km SE of Castle Dale, Utah | M3.9 | 62 km | 6 km |
| Apr 14, 2010 | 30 km ENE of Boulder Town, Utah | M3.9 | 135 km | 13 km |
| Jan 24, 2013 | 22 km E of La Sal, Utah | M3.9 | 127 km | 1 km |
| Mar 1, 2016 | 34 km N of Halls Crossing, Utah | M3.8 | 143 km | 15 km |
| May 31, 2022 | 37 km ENE of Thompson Springs, Utah | M3.8 | 76 km | 7 km |
| Feb 5, 1998 | 7 km N of Helper, Utah | M3.8 | 103 km | -2 km |
| Feb 6, 1991 | 7 km WNW of Hiawatha, Utah | M3.8 | 98 km | 5 km |
| Jul 6, 1999 | 27 km WNW of Naturita, Colorado | M3.7 | 138 km | 2 km |
| Dec 22, 1999 | 31 km SW of Emery, Utah | M3.7 | 121 km | 2 km |
| Nov 8, 1991 | 17 km WNW of Bonanza, Utah | M3.7 | 142 km | 4 km |
| Mar 2, 1991 | 27 km SSW of Jensen, Utah | M3.7 | 142 km | -3 km |
| Jun 3, 1999 | 28 km E of La Sal, Utah | M3.7 | 134 km | 1 km |
| Jan 8, 1999 | 31 km SW of Emery, Utah | M3.7 | 122 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
19 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.
| Date | Rating | Distance | Path | Fatalities |
| Jun 10, 1970 | EF2 | 40 km | 0.1 mi | 0 |
| Nov 2, 1967 | EF2 | 93 km | 0.1 mi | 0 |
| May 4, 1961 | EF2 | 2 km | 9.4 mi | 0 |
| Oct 6, 2010 | EF0 | 80 km | 1.2 mi | 0 |
| Jul 26, 2010 | EF0 | 78 km | 0.1 mi | 0 |
| Sep 22, 2006 | EF0 | 64 km | 0.2 mi | 0 |
| Jun 8, 2006 | EF0 | 4 km | 0.5 mi | 0 |
| Sep 12, 2002 | EF0 | 84 km | 0.2 mi | 0 |
| Jul 25, 2001 | EF0 | 87 km | 0.5 mi | 0 |
| Sep 8, 2000 | EF0 | 42 km | 2.0 mi | 0 |
| Apr 18, 2000 | EF0 | 68 km | 0.5 mi | 0 |
| Jul 26, 1991 | EF0 | 11 km | 0.1 mi | 0 |
| Jul 26, 1991 | EF0 | 5 km | 0.1 mi | 0 |
| Aug 31, 1986 | EF0 | 70 km | 0.2 mi | 0 |
| Jul 24, 1981 | EF0 | 74 km | 0.2 mi | 0 |
| May 31, 1969 | EF0 | 97 km | 0.1 mi | 0 |
| May 31, 1969 | EF0 | 97 km | 0.1 mi | 0 |
| May 31, 1969 | EF0 | 97 km | 0.1 mi | 0 |
| May 9, 1966 | EF0 | 87 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: RATTLE COMPLEX (RATTLE) (87,396 acres, 2002).
| Year | Name | Acres Burned | Distance |
| 2002 | RATTLE COMPLEX (RATTLE) | 87,396 | 61 km |
| 2018 | TRAIL MOUNTAIN | 18,342 | 98 km |
| 1989 | DIAMONDPK | 15,685 | 72 km |
| 2001 | INDIAN SPR | 13,458 | 97 km |
| 2018 | BEAR TRAP | 9,215 | 42 km |
| 2021 | PACK CREEK | 8,859 | 96 km |
| 2002 | BLACK CANYON | 6,078 | 39 km |
| 1999 | TOMS CYN | 6,030 | 99 km |
| 1995 | TRIANGLE | 5,688 | 95 km |
| 1990 | FLORENCE | 5,123 | 46 km |
| 1994 | BITTCRCOMP | 4,445 | 99 km |
| 2002 | COUNTY LINE | 4,298 | 57 km |
| 2010 | MOONWATER POINT | 4,200 | 50 km |
| 1989 | RYAN CREEK | 3,843 | 97 km |
| 2008 | PORCUPINE RANCH | 3,768 | 90 km |
| 2004 | BIG CANYON | 3,618 | 51 km |
| 1995 | VALLEY CITY 2 | 3,236 | 38 km |
| 1989 | RATTLESNAK | 3,164 | 40 km |
| 1999 | LITTLE HOLE | 2,997 | 89 km |
| 2006 | WESTWATER 2 | 2,861 | 87 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 0.5 in | Coldest |
| February | 34°F (1°C) | 0.4 in | |
| March | 44°F (7°C) | 0.7 in | |
| April | 53°F (12°C) | 0.5 in | |
| May | 63°F (17°C) | 0.6 in | |
| June | 73°F (23°C) | 0.3 in | Driest |
| July | 81°F (27°C) | 0.7 in | Warmest |
| August | 77°F (25°C) | 0.7 in | |
| September | 67°F (19°C) | 0.8 in | |
| October | 54°F (12°C) | 0.9 in | Wettest |
| November | 39°F (4°C) | 0.5 in | |
| December | 28°F (-2°C) | 0.3 in |
Green River has a seasonal temperature swing of 53°F / from 28°F in January to 81°F in July. Total annual precipitation is 6.8 inches, with October being the wettest month (0.9") and June the driest (0.3").