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Weather & Climate in Powder Horn, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Powder Horn has a cool climate with an average annual temperature of 45°F (7°C). Winters average 24°F in January while summers reach 71°F in July. The area gets 311 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 14.9 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 4,045 feet.
Temperature
24°F Jan (-4°C)
71°F Jul (22°C)
| Annual Average | 45.4°F |
| 16% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 311 days/yr |
Geography
| Elevation | 4,045 ft (1,233 m) |
| Area | 1.9 sq mi (5.0 km²) |
| Population Density | 426/sq mi |
| Coordinates | 44.6912°N, 106.9727°W |
| Timezone | America/Denver |
| County | Sheridan County County |
| Nearest Airport | Sheridan County (SHR) 5 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 65.2 / 100 |
| Social Vulnerability | 32.4 / 100 |
| Community Resilience | 50.9 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
| Volcano | Very Low |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
44 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| Aug 22, 2009 | 20 km SSE of Birney, Montana | M4.0 | 65 km | 14 km |
| Nov 3, 2017 | 57 km S of Ten Sleep, Wyoming | M4.0 | 134 km | 17 km |
| Apr 13, 2021 | 51 km S of Ten Sleep, Wyoming | M3.9 | 128 km | 12 km |
| Feb 25, 1993 | 31 km N of Arvada, Wyoming | M3.9 | 77 km | 5 km |
| Feb 13, 2023 | Wyoming | M3.7 | 132 km | 10 km |
| Aug 31, 1992 | 34 km WNW of Kaycee, Wyoming | M3.6 | 97 km | 5 km |
| Jul 4, 2021 | 43 km S of Ten Sleep, Wyoming | M3.6 | 121 km | 17 km |
| Dec 23, 1991 | 10 km SW of Colstrip, Montana | M3.6 | 127 km | 5 km |
| Jan 9, 2007 | 7 km ENE of East Thermopolis, Wyoming | M3.5 | 146 km | 5 km |
| Nov 16, 1993 | 17 km SSE of Ten Sleep, Wyoming | M3.5 | 96 km | 5 km |
| Nov 3, 1999 | 8 km NNW of Broadus, Montana | M3.5 | 149 km | 10 km |
| Sep 3, 2023 | 32 km NW of Kaycee, Wyoming | M3.3 | 86 km | 5 km |
| Apr 5, 2002 | 7 km W of South Flat, Wyoming | M3.3 | 122 km | 5 km |
| Mar 10, 1993 | 27 km W of Midwest, Wyoming | M3.2 | 147 km | 5 km |
| Oct 31, 2017 | 56 km S of Ten Sleep, Wyoming | M3.2 | 136 km | 15 km |
| Nov 9, 1999 | 58 km ENE of Shoshoni, Wyoming | M3.1 | 141 km | 5 km |
| May 10, 2013 | 25 km NW of Wright, Wyoming | M3.1 | 133 km | 9 km |
| Feb 13, 1998 | 12 km NE of Hyattville, Wyoming | M3.0 | 59 km | 5 km |
| Sep 27, 2016 | 43 km WSW of Gillette, Wyoming | M3.0 | 97 km | 14 km |
| Oct 25, 2009 | 34 km S of Buffalo, Wyoming | M3.0 | 77 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
58 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 4 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 2, 1985 | EF3 | 79 km | 0.2 mi | 0 |
| Jun 1, 2018 | EF2 | 78 km | 1.0 mi | 0 |
| Jun 1, 2018 | EF2 | 74 km | 1.0 mi | 0 |
| Jul 4, 1978 | EF2 | 84 km | 5.0 mi | 0 |
| Jun 26, 1959 | EF2 | 50 km | 9.2 mi | 1 |
| Jun 3, 1958 | EF2 | 66 km | 0.2 mi | 0 |
| Jun 19, 2019 | EF1 | 61 km | 4.1 mi | 0 |
| Jun 7, 2018 | EF1 | 98 km | 0.8 mi | 0 |
| Aug 30, 2010 | EF1 | 90 km | 4.6 mi | 0 |
| Jun 21, 2010 | EF1 | 84 km | 1.0 mi | 0 |
| Jun 1, 2009 | EF1 | 82 km | 0.4 mi | 0 |
| Jun 26, 2001 | EF1 | 89 km | 0.7 mi | 0 |
| Jun 6, 1997 | EF1 | 86 km | 1.0 mi | 0 |
| Jun 21, 1984 | EF1 | 37 km | 2.0 mi | 0 |
| Jun 21, 1984 | EF1 | 73 km | 1.0 mi | 0 |
| Jun 15, 1984 | EF1 | 38 km | 1.0 mi | 0 |
| May 9, 1977 | EF1 | 56 km | 4.5 mi | 0 |
| Jul 4, 1976 | EF1 | 91 km | 0.2 mi | 0 |
| Jul 30, 1975 | EF1 | 90 km | 2.0 mi | 0 |
| Aug 14, 1974 | EF1 | 91 km | 1.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: REMINGTON (192,577 acres, 2024).
| Year | Name | Acres Burned | Distance |
| 2024 | REMINGTON | 192,577 | 77 km |
| 2024 | HOUSE DRAW | 167,966 | 81 km |
| 2017 | DEER CREEK | 90,147 | 50 km |
| 2012 | TAYLOR CREEK | 64,383 | 97 km |
| 2000 | STAG | 62,381 | 96 km |
| 1994 | BABY DEAN | 61,955 | 92 km |
| 2024 | FLAT ROCK | 50,782 | 96 km |
| 2018 | TEREK | 43,872 | 89 km |
| 2006 | BUFFALO CREEK | 37,630 | 55 km |
| 2011 | DIAMOND COMPLEX | 33,546 | 88 km |
| 2017 | WITTEN | 27,938 | 78 km |
| 2012 | CATO | 26,816 | 46 km |
| 2020 | WADDLE CREEK | 25,809 | 45 km |
| 2024 | MCGHEE | 19,161 | 71 km |
| 1988 | KIRBY | 14,253 | 72 km |
| 1994 | BARREL SPR | 13,526 | 44 km |
| 1988 | LOST | 13,081 | 42 km |
| 2007 | BONE CREEK | 12,776 | 54 km |
| 1991 | HORSLEY | 11,829 | 54 km |
| 2007 | POWDER RIVER COMPLEX | 11,716 | 85 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 0.7 in | |
| February | 26°F (-3°C) | 0.5 in | Driest |
| March | 35°F (2°C) | 1.0 in | |
| April | 44°F (7°C) | 1.8 in | |
| May | 53°F (12°C) | 2.6 in | Wettest |
| June | 63°F (17°C) | 2.2 in | |
| July | 71°F (22°C) | 1.1 in | Warmest |
| August | 68°F (20°C) | 0.8 in | |
| September | 57°F (14°C) | 1.4 in | |
| October | 46°F (8°C) | 1.3 in | |
| November | 32°F (-0°C) | 0.8 in | |
| December | 23°F (-5°C) | 0.6 in | Coldest |
Powder Horn has a seasonal temperature swing of 48°F / from 23°F in December to 71°F in July. Total annual precipitation is 14.8 inches, with May being the wettest month (2.6") and February the driest (0.5").