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Weather & Climate in Sundance, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sundance has a cool climate with an average annual temperature of 44°F (7°C). Winters average 23°F in January while summers reach 69°F in July. The area gets 276 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 20.4 inches (drier than the 38-inch national average). The area receives 81.3 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 4,727 feet.
Temperature
23°F Jan (-5°C)
69°F Jul (20°C)
| Annual Average | 43.8°F |
| 19% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 69°F (20°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 4,727 ft (1,441 m) |
| Area | 3.1 sq mi (7.9 km²) |
| Population Density | 319/sq mi |
| Coordinates | 44.4048°N, 104.3662°W |
| Timezone | America/Denver |
| County | Crook County County |
| Nearest Airport | Northeast Wyoming Regional (GCC) 58 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 16.1 / 100 |
| Social Vulnerability | 33.6 / 100 |
| Community Resilience | 2.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
22 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.
| Sep 25, 2009 | 15 km E of Alzada, Montana | M4.2 | 70 km | 5 km |
| Feb 25, 1993 | 31 km N of Arvada, Wyoming | M3.9 | 146 km | 5 km |
| Feb 6, 1996 | 13 km WNW of Hill City, South Dakota | M3.7 | 69 km | 5 km |
| Apr 9, 1996 | 34 km SW of Edgemont, South Dakota | M3.7 | 150 km | 5 km |
| Mar 9, 2025 | 7 km W of Fairburn, South Dakota | M3.6 | 118 km | 5 km |
| Dec 12, 2013 | 10 km WSW of Hermosa, South Dakota | M3.5 | 106 km | 5 km |
| Mar 26, 2021 | 10 km E of Edgemont, South Dakota | M3.4 | 133 km | 5 km |
| May 10, 2013 | 25 km NW of Wright, Wyoming | M3.1 | 120 km | 9 km |
| Feb 7, 2007 | 11 km WSW of Wasta, South Dakota | M3.1 | 148 km | 5 km |
| Jun 29, 2024 | 22 km ESE of Hill View Heights, Wyoming | M3.0 | 81 km | 10 km |
| Jan 16, 2012 | 25 km E of Buffalo Gap, South Dakota | M3.0 | 150 km | 5 km |
| Sep 27, 2016 | 43 km WSW of Gillette, Wyoming | M3.0 | 134 km | 14 km |
| May 25, 2018 | 45 km W of Biddle, Montana | M2.9 | 144 km | 16 km |
| Jun 16, 2024 | 7 km NNE of Buffalo Gap, South Dakota | M2.9 | 130 km | 8 km |
| Jan 5, 2004 | 28 km SSE of Hill View Heights, Wyoming | M2.8 | 95 km | 5 km |
| Mar 18, 1994 | 4 km SSW of Hot Springs, South Dakota | M2.8 | 132 km | 5 km |
| Aug 7, 2022 | 38 km N of Arvada, Wyoming | M2.8 | 148 km | 11 km |
| Sep 4, 2023 | 50 km WSW of Antelope Valley-Crestview, Wyoming | M2.8 | 140 km | 5 km |
| Sep 5, 1993 | 4 km NNW of Central City, South Dakota | M2.7 | 45 km | 5 km |
| Mar 31, 2009 | 36 km NNE of Arvada, Wyoming | M2.6 | 142 km | 17 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
181 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 48 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 29, 1993 | EF3 | 25 km | 3.0 mi | 0 |
| May 11, 1991 | EF3 | 94 km | 2.0 mi | 0 |
| Jun 25, 1975 | EF3 | 20 km | 11.5 mi | 0 |
| Jul 18, 1965 | EF3 | 68 km | 0.1 mi | 0 |
| Jul 12, 1965 | EF3 | 20 km | 20.8 mi | 0 |
| Jul 18, 1963 | EF3 | 98 km | 2.3 mi | 0 |
| Jul 6, 2020 | EF2 | 28 km | 5.1 mi | 0 |
| Jul 6, 2020 | EF2 | 25 km | 2.1 mi | 0 |
| Jun 13, 2014 | EF2 | 38 km | 16.5 mi | 0 |
| Jul 13, 2009 | EF2 | 21 km | 9.4 mi | 0 |
| Jul 12, 1993 | EF2 | 65 km | 2.0 mi | 0 |
| May 11, 1991 | EF2 | 95 km | 1.0 mi | 0 |
| May 6, 1988 | EF2 | 82 km | 1.5 mi | 0 |
| May 10, 1985 | EF2 | 26 km | 1.0 mi | 0 |
| May 31, 1984 | EF2 | 48 km | 0.5 mi | 0 |
| Jun 25, 1975 | EF2 | 91 km | 16.3 mi | 0 |
| Jun 28, 1972 | EF2 | 54 km | 0.1 mi | 0 |
| Jul 23, 1969 | EF2 | 56 km | 0.2 mi | 0 |
| Jun 20, 1968 | EF2 | 43 km | 13.1 mi | 0 |
| Jul 23, 1966 | EF2 | 86 km | 3.8 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: JASPER (82,298 acres, 2000).
| Year | Name | Acres Burned | Distance |
| 2000 | JASPER | 82,298 | 76 km |
| 2012 | OIL CREEK | 63,182 | 46 km |
| 2024 | CONSTITUTION | 23,963 | 86 km |
| 2003 | RED POINT | 18,057 | 90 km |
| 2006 | THORN DIVIDE COMPLEX | 15,261 | 37 km |
| 2002 | BATTLE CREEK | 15,034 | 97 km |
| 2001 | ELK MOUNTAIN 2 | 13,758 | 78 km |
| 2001 | ROGERS SHACK | 11,794 | 93 km |
| 2002 | GRIZZLY GULCH | 11,487 | 54 km |
| 1994 | PETERSON-ELLIOTT | 8,321 | 69 km |
| 1990 | RIDGE | 7,556 | 94 km |
| 2002 | POWNELL | 7,460 | 95 km |
| 2011 | WHOOPUP | 7,377 | 78 km |
| 2022 | FISH | 7,045 | 17 km |
| 2016 | KARA CREEK | 6,543 | 26 km |
| 1996 | WILDCAT | 6,281 | 99 km |
| 2006 | HORSE CREEK 2 | 6,260 | 97 km |
| 1988 | NEW HAVEN | 6,118 | 56 km |
| 2000 | WOOD DRAW | 5,792 | 56 km |
| 2010 | 35 MILE MARKER | 5,054 | 90 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 0.6 in | Driest |
| February | 24°F (-4°C) | 0.7 in | |
| March | 31°F (-0°C) | 0.9 in | |
| April | 40°F (5°C) | 2.0 in | |
| May | 50°F (10°C) | 2.9 in | |
| June | 60°F (16°C) | 3.3 in | Wettest |
| July | 69°F (20°C) | 1.9 in | Warmest |
| August | 66°F (19°C) | 1.7 in | |
| September | 57°F (14°C) | 1.5 in | |
| October | 45°F (7°C) | 1.1 in | |
| November | 31°F (-1°C) | 0.8 in | |
| December | 23°F (-5°C) | 0.8 in | Coldest |
Sundance has a seasonal temperature swing of 46°F / from 23°F in December to 69°F in July. Total annual precipitation is 18.1 inches, with June being the wettest month (3.3") and January the driest (0.6").