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Weather & Climate in Moorcroft, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Moorcroft has a cool climate with an average annual temperature of 45°F (7°C). Winters average 22°F in January while summers reach 71°F in July. The area gets 258 sunny days per year, above the national average. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 4,273 feet.
Temperature
22°F Jan (-6°C)
71°F Jul (22°C)
| Annual Average | 44.6°F |
| 17% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 258 days/yr |
Geography
| Elevation | 4,273 ft (1,302 m) |
| Area | 1.3 sq mi (3.3 km²) |
| Population Density | 843/sq mi |
| Coordinates | 44.2645°N, 104.9476°W |
| Timezone | America/Denver |
| County | Crook County County |
| Nearest Airport | Northeast Wyoming Regional (GCC) 30 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
27 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 | 102 km | 5 km |
| Feb 25, 1993 | 31 km N of Arvada, Wyoming | M3.9 | 115 km | 5 km |
| Feb 6, 1996 | 13 km WNW of Hill City, South Dakota | M3.7 | 102 km | 5 km |
| Apr 9, 1996 | 34 km SW of Edgemont, South Dakota | M3.7 | 149 km | 5 km |
| Mar 9, 2025 | 7 km W of Fairburn, South Dakota | M3.6 | 147 km | 5 km |
| Dec 12, 2013 | 10 km WSW of Hermosa, South Dakota | M3.5 | 139 km | 5 km |
| Nov 3, 1999 | 8 km NNW of Broadus, Montana | M3.5 | 145 km | 10 km |
| Mar 26, 2021 | 10 km E of Edgemont, South Dakota | M3.4 | 146 km | 5 km |
| May 10, 2013 | 25 km NW of Wright, Wyoming | M3.1 | 72 km | 9 km |
| Oct 25, 2009 | 34 km S of Buffalo, Wyoming | M3.0 | 139 km | 5 km |
| Jun 30, 1993 | 25 km N of Douglas, Wyoming | M3.0 | 146 km | 5 km |
| Sep 27, 2016 | 43 km WSW of Gillette, Wyoming | M3.0 | 86 km | 14 km |
| Jun 29, 2024 | 22 km ESE of Hill View Heights, Wyoming | M3.0 | 101 km | 10 km |
| May 25, 2018 | 45 km W of Biddle, Montana | M2.9 | 119 km | 16 km |
| Feb 22, 1992 | 30 km E of Buffalo, Wyoming | M2.9 | 109 km | 5 km |
| Jan 5, 2004 | 28 km SSE of Hill View Heights, Wyoming | M2.8 | 106 km | 5 km |
| Apr 11, 2013 | 33 km NNE of Kaycee, Wyoming | M2.8 | 124 km | 8 km |
| Feb 19, 2018 | 35 km NE of Edgerton, Wyoming | M2.8 | 106 km | 5 km |
| Aug 7, 2022 | 38 km N of Arvada, Wyoming | M2.8 | 119 km | 11 km |
| Sep 4, 2023 | 50 km WSW of Antelope Valley-Crestview, Wyoming | M2.8 | 92 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
189 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 2 fatalities, 37 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 1, 2018 | EF3 | 61 km | 3.8 mi | 0 |
| Jun 29, 1993 | EF3 | 72 km | 3.0 mi | 0 |
| May 23, 1978 | EF3 | 64 km | 14.5 mi | 0 |
| Jun 25, 1975 | EF3 | 48 km | 11.5 mi | 0 |
| Jul 12, 1965 | EF3 | 56 km | 20.8 mi | 0 |
| Jun 23, 2023 | EF2 | 91 km | 3.8 mi | 0 |
| Jul 6, 2020 | EF2 | 71 km | 5.1 mi | 0 |
| Jul 6, 2020 | EF2 | 68 km | 2.1 mi | 0 |
| Jun 13, 2014 | EF2 | 58 km | 16.5 mi | 0 |
| Jul 13, 2009 | EF2 | 55 km | 9.4 mi | 0 |
| Aug 12, 2005 | EF2 | 73 km | 1.5 mi | 2 |
| May 6, 1988 | EF2 | 33 km | 1.5 mi | 0 |
| May 10, 1985 | EF2 | 46 km | 1.0 mi | 0 |
| May 31, 1984 | EF2 | 4 km | 0.5 mi | 0 |
| Jul 30, 1975 | EF2 | 89 km | 12.4 mi | 0 |
| Jun 25, 1975 | EF2 | 44 km | 16.3 mi | 0 |
| Jun 20, 1968 | EF2 | 82 km | 13.1 mi | 0 |
| Jul 22, 1966 | EF2 | 44 km | 3.6 mi | 0 |
| Jul 2, 1964 | EF2 | 59 km | 0.1 mi | 0 |
| May 18, 1961 | EF2 | 33 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: JASPER (82,298 acres, 2000).
| Year | Name | Acres Burned | Distance |
| 2000 | JASPER | 82,298 | 99 km |
| 2012 | OIL CREEK | 63,182 | 60 km |
| 2024 | FLAT ROCK | 50,782 | 72 km |
| 2024 | CONSTITUTION | 23,963 | 52 km |
| 1999 | CLARKELEN | 21,432 | 65 km |
| 2024 | WILDCAT CREEK | 18,751 | 80 km |
| 2006 | THORN DIVIDE COMPLEX | 15,261 | 28 km |
| 2001 | ELK MOUNTAIN 2 | 13,758 | 91 km |
| 2002 | GRIZZLY GULCH | 11,487 | 100 km |
| 1988 | ROCHELLE HILLS 2 | 8,718 | 77 km |
| 1994 | PETERSON-ELLIOTT | 8,321 | 54 km |
| 1990 | RIDGE | 7,556 | 98 km |
| 2002 | POWNELL | 7,460 | 64 km |
| 2002 | HAIRY | 7,402 | 78 km |
| 2011 | WHOOPUP | 7,377 | 92 km |
| 2022 | FISH | 7,045 | 54 km |
| 2016 | KARA CREEK | 6,543 | 25 km |
| 1996 | WILDCAT | 6,281 | 59 km |
| 2006 | HORSE CREEK 2 | 6,260 | 70 km |
| 2024 | DEER CREEK | 6,257 | 92 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 0.4 in | Coldest, Driest |
| February | 24°F (-4°C) | 0.5 in | |
| March | 33°F (1°C) | 0.6 in | |
| April | 43°F (6°C) | 1.3 in | |
| May | 53°F (12°C) | 2.5 in | |
| June | 63°F (17°C) | 2.5 in | Wettest |
| July | 71°F (22°C) | 1.7 in | Warmest |
| August | 70°F (21°C) | 1.2 in | |
| September | 59°F (15°C) | 1.2 in | |
| October | 46°F (8°C) | 0.9 in | |
| November | 33°F (0°C) | 0.5 in | |
| December | 22°F (-5°C) | 0.5 in |
Moorcroft has a seasonal temperature swing of 49°F / from 22°F in January to 71°F in July. Total annual precipitation is 13.8 inches, with June being the wettest month (2.5") and January the driest (0.4").