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Weather & Climate in Granger, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Granger has a cool climate with an average annual temperature of 43°F (6°C). Winters average 22°F in January while summers reach 69°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 7.9 inches (drier than the 38-inch national average). The area receives 30.8 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 6,265 feet.
Temperature
22°F Jan (-6°C)
69°F Jul (21°C)
| Annual Average | 43.3°F |
| 20% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 322 days/yr |
Geography
| Elevation | 6,265 ft (1,910 m) |
| Area | 2.5 sq mi (6.6 km²) |
| Population Density | 85/sq mi |
| Coordinates | 41.5979°N, 109.9652°W |
| Timezone | America/Denver |
| County | Uinta County County |
| Nearest Airport | Southwest Wyoming Regional (RKS) 47 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 16.7 / 100 |
| Social Vulnerability | 15.0 / 100 |
| Community Resilience | 12.5 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | No Rating |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
201 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.9.
| Apr 15, 2010 | 9 km NE of Randolph, Utah | M4.9 | 95 km | 10 km |
| Feb 7, 1994 | 4 km SW of Fairview, Wyoming | M4.5 | 146 km | 5 km |
| Apr 7, 1994 | 11 km SW of Smoot, Wyoming | M4.3 | 139 km | 5 km |
| Apr 8, 1994 | 13 km SW of Smoot, Wyoming | M4.3 | 138 km | 5 km |
| Jan 30, 2000 | 8 km ESE of Little America, Wyoming | M4.3 | 20 km | 5 km |
| May 25, 2016 | 15 km NNE of Tabiona, Utah | M4.0 | 136 km | 16 km |
| Apr 7, 1994 | 8 km SW of Fairview, Wyoming | M4.0 | 145 km | 5 km |
| Feb 8, 1994 | 4 km WSW of Fairview, Wyoming | M3.9 | 149 km | 5 km |
| Mar 1, 2013 | 7 km SW of Smoot, Wyoming | M3.9 | 136 km | 5 km |
| May 16, 1996 | 18 km NE of Georgetown, Idaho | M3.9 | 150 km | 5 km |
| Feb 7, 1994 | 4 km WSW of Fairview, Wyoming | M3.9 | 148 km | 5 km |
| Mar 1, 1995 | 20 km SW of Smoot, Wyoming | M3.9 | 137 km | 4 km |
| Feb 25, 2007 | Wyoming | M3.8 | 113 km | -2 km |
| Apr 9, 1994 | 5 km SW of Smoot, Wyoming | M3.8 | 137 km | 5 km |
| Jun 19, 1998 | 18 km SW of Fairview, Wyoming | M3.8 | 145 km | 10 km |
| Jul 17, 1997 | 9 km E of Bennington, Idaho | M3.8 | 137 km | 4 km |
| Feb 5, 1994 | 4 km WSW of Smoot, Wyoming | M3.7 | 139 km | 5 km |
| Oct 21, 1996 | 42 km ESE of Boulder, Wyoming | M3.7 | 120 km | 5 km |
| Apr 8, 1994 | 9 km SW of Fairview, Wyoming | M3.7 | 146 km | 5 km |
| Aug 31, 2023 | 15 km ENE of Wolf Creek, Utah | M3.7 | 142 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
25 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.
| Date | Rating | Distance | Path | Fatalities |
| May 10, 1950 | EF2 | 60 km | 2.0 mi | 0 |
| Jul 10, 2001 | EF1 | 23 km | 5.0 mi | 0 |
| Apr 20, 2001 | EF1 | 34 km | 0.2 mi | 0 |
| Apr 14, 2000 | EF1 | 34 km | 0.5 mi | 0 |
| Jul 31, 1978 | EF1 | 66 km | 1.0 mi | 0 |
| Jun 27, 1974 | EF1 | 41 km | 0.1 mi | 0 |
| Sep 9, 1973 | EF1 | 36 km | 0.1 mi | 0 |
| Jun 23, 1965 | EF1 | 99 km | 0.6 mi | 0 |
| May 28, 2018 | EF0 | 2 km | 3.5 mi | 0 |
| May 7, 2014 | EF0 | 59 km | 0.5 mi | 0 |
| Sep 15, 2013 | EF0 | 38 km | 0.1 mi | 0 |
| Aug 21, 2001 | EF0 | 86 km | 2.0 mi | 0 |
| Jun 14, 1997 | EF0 | 84 km | 0.5 mi | 0 |
| Jun 10, 1997 | EF0 | 57 km | 0.1 mi | 0 |
| May 15, 1992 | EF0 | 98 km | 0.1 mi | 0 |
| Sep 9, 1991 | EF0 | 76 km | 0.5 mi | 0 |
| Sep 9, 1991 | EF0 | 57 km | 0.4 mi | 0 |
| May 2, 1991 | EF0 | 71 km | 0.1 mi | 0 |
| Aug 4, 1990 | EF0 | 58 km | 0.1 mi | 0 |
| Jul 24, 1990 | EF0 | 86 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: WLD HORSE (41,881 acres, 2000).
| Year | Name | Acres Burned | Distance |
| 2000 | WLD HORSE | 41,881 | 61 km |
| 2000 | SHEEP MT | 31,393 | 71 km |
| 2002 | MUSTANG | 20,607 | 90 km |
| 1999 | BRIDGER BA | 15,227 | 80 km |
| 2000 | FONTENELLE | 14,894 | 87 km |
| 2018 | NORTH EDEN | 14,398 | 100 km |
| 2007 | RED CANYON RX BURN-H | 13,464 | 67 km |
| 2018 | LANEY RIM | 11,589 | 94 km |
| 2020 | RICHARD MTN | 7,802 | 89 km |
| 2010 | POLE CREEK STANDS | 6,900 | 85 km |
| 2010 | WINDMILL | 5,935 | 74 km |
| 1988 | LITTLEBRYN | 5,300 | 74 km |
| 1985 | WEYMAN | 5,058 | 82 km |
| 2006 | SALT WELLS BASIN | 4,581 | 90 km |
| 2005 | ROCK CREEK RX | 4,302 | 77 km |
| 2005 | SHEEP CREEK WFU | 4,128 | 82 km |
| 2002 | COMMISARY | 3,840 | 75 km |
| 2017 | POLE CREEK | 3,395 | 88 km |
| 2018 | BLACK BUTTE | 3,124 | 98 km |
| 1988 | SIESMIC | 2,969 | 64 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 0.3 in | |
| February | 22°F (-6°C) | 0.3 in | Driest |
| March | 31°F (-0°C) | 0.4 in | |
| April | 40°F (5°C) | 0.8 in | |
| May | 50°F (10°C) | 1.0 in | Wettest |
| June | 60°F (15°C) | 0.9 in | |
| July | 69°F (21°C) | 0.7 in | Warmest |
| August | 65°F (18°C) | 0.7 in | |
| September | 54°F (12°C) | 0.8 in | |
| October | 43°F (6°C) | 0.6 in | |
| November | 28°F (-2°C) | 0.4 in | |
| December | 19°F (-7°C) | 0.4 in | Coldest |
Granger has a seasonal temperature swing of 50°F / from 19°F in December to 69°F in July. Total annual precipitation is 7.3 inches, with May being the wettest month (1.0") and February the driest (0.3").