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Weather & Climate in Powell, WY

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Powell has a cool climate with an average annual temperature of 43°F (6°C). Winters average 19°F in January while summers reach 69°F in July. The area gets 293 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). The area receives 11.2 inches of snow annually. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 4,385 feet.

Temperature

19°F Jan (-7°C) 69°F Jul (20°C)
Annual Average43.2°F
20% below US avg
January Average19°F (-7°C)
July Average69°F (20°C)
Sunny Days293 days/yr

Geography

Elevation4,385 ft (1,337 m)
Area4.2 sq mi (11.0 km²)
Population Density1,507/sq mi
Coordinates44.7618°N, 108.7576°W
TimezoneAmerica/Denver
CountyCarbon County County
Nearest AirportYellowstone Regional (COD)
21 miles away

Precipitation & Snow

Annual Rainfall 6.7"
82% below US avg
Snowfall 11.2"
Wettest Month (May) 1.54"
Driest Month (Feb) 0.16"

Air Quality

AQI Median34.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score59.8 / 100
Social Vulnerability74.8 / 100
Community Resilience64.1 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Very Low
Wildfire Relatively Moderate
Flood Relatively Low
Hail Relatively Low
Strong Wind Very Low
Heat Wave Very Low
Winter Weather Relatively Moderate
Lightning Relatively Moderate
Ice Storm Very Low
Drought Relatively Low
Cold Wave Relatively Low
Landslide Relatively High
Volcano Very Low
Avalanche Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

202 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.

May 11, 2022 36 km S of Silver Gate, Montana M4.2 98 km 14 km
Mar 25, 2008 35 km S of Silver Gate, Montana M4.2 100 km 4 km
Aug 28, 1995 62 km NNE of Kelly, Wyoming M4.2 142 km 8 km
May 18, 2006 69 km NNE of Kelly, Wyoming M3.8 135 km 7 km
Nov 26, 1998 63 km SE of West Yellowstone, Montana M3.8 146 km 6 km
Mar 29, 2023 56 km SSE of Mammoth, Wyoming M3.7 130 km 4 km
Sep 24, 1994 39 km SSE of Mammoth, Wyoming M3.7 136 km 5 km
Jul 17, 2021 63 km SSE of Mammoth, Wyoming M3.6 130 km 6 km
Jul 20, 1992 52 km SSE of Mammoth, Wyoming M3.6 128 km 0 km
Jul 20, 1992 51 km SSE of Mammoth, Wyoming M3.5 129 km 2 km
Aug 15, 2019 59 km NNE of Kelly, Wyoming M3.5 147 km 7 km
Aug 7, 1991 31 km NNW of Pavillion, Wyoming M3.5 140 km 5 km
Nov 16, 1993 17 km SSE of Ten Sleep, Wyoming M3.5 147 km 5 km
Jan 9, 2007 7 km ENE of East Thermopolis, Wyoming M3.5 132 km 5 km
Jun 2, 1999 49 km ESE of West Yellowstone, Montana M3.5 149 km 2 km
Jan 2, 2009 54 km SSE of Mammoth, Wyoming M3.5 129 km 7 km
Jan 12, 2014 23 km SE of Mammoth, Wyoming M3.4 139 km 9 km
Mar 4, 2019 35 km SSW of Silver Gate, Montana M3.3 105 km 6 km
Mar 19, 1993 40 km SSE of Mammoth, Wyoming M3.3 135 km 2 km
Jan 9, 2009 42 km SSW of Silver Gate, Montana M3.3 118 km 7 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

44 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 2 injuries.

Date Rating Distance Path Fatalities
Aug 2, 1985 EF3 64 km 0.2 mi 0
Jun 16, 2010 EF2 47 km 1.0 mi 0
Jul 11, 1978 EF2 12 km 0.4 mi 0
Jul 4, 1978 EF2 67 km 5.0 mi 0
Jul 24, 1967 EF2 64 km 0.1 mi 0
Jun 26, 1964 EF2 1 km 1.0 mi 0
Jul 9, 1962 EF2 60 km 0.5 mi 0
Jun 12, 1962 EF2 42 km 0.5 mi 0
Jun 26, 1959 EF2 100 km 9.2 mi 1
Jun 3, 1958 EF2 82 km 0.2 mi 0
Jun 1, 2009 EF1 95 km 0.4 mi 0
Jun 26, 2001 EF1 64 km 0.7 mi 0
Jun 6, 1997 EF1 60 km 1.0 mi 0
May 18, 1991 EF1 13 km 0.2 mi 0
May 24, 1990 EF1 38 km 0.2 mi 0
Aug 25, 1986 EF1 32 km 1.0 mi 0
Jul 24, 1981 EF1 31 km 0.1 mi 0
Jun 18, 1978 EF1 41 km 0.1 mi 0
Jul 4, 1976 EF1 72 km 0.2 mi 0
Jun 26, 1976 EF1 2 km 2.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

1 volcano within 200 km. Closest: Yellowstone (156 km).

Name Type Elevation Last Eruption Distance
Yellowstone Caldera(s) 2,805 m (9,203 ft) -1350 156 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: CLOVERMIST (303,427 acres, 1988).

Year Name Acres Burned Distance
1988 CLOVERMIST 303,427 90 km
2008 GUNBARREL 69,730 62 km
2006 LITTLE VENUS 33,490 93 km
2021 ROBERTSON DRAW 31,132 50 km
1996 SHEPARD MTN 17,379 84 km
2007 BONE CREEK 12,776 89 km
2016 WHIT 12,731 62 km
2019 FISHHAWK 10,775 96 km
2003 BOULDER BASIN II 10,029 92 km
2008 CASCADE 10,017 71 km
1999 ROOSTER 9,624 83 km
2021 CRATER RIDGE 8,147 82 km
2011 HOLE IN THE WALL 6,559 53 km
2003 LITTLE HORN II 5,889 87 km
2003 DEEP LAKE 5,466 48 km
2002 COW CREEK 5,162 92 km
2002 RED WAFFLE 5,060 46 km
2005 BIG HORN 4,899 67 km
1991 ROBERTSON 4,812 47 km
2000 MIDDLECREE 4,534 91 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 19°F (-7°C) 0.3 in Coldest
February 28°F (-3°C) 0.2 in Driest
March 36°F (2°C) 0.4 in
April 45°F (7°C) 0.6 in
May 54°F (12°C) 1.5 in Wettest
June 63°F (17°C) 1.3 in
July 69°F (20°C) 0.9 in Warmest
August 67°F (20°C) 0.6 in
September 57°F (14°C) 0.9 in
October 46°F (8°C) 0.6 in
November 32°F (-0°C) 0.3 in
December 22°F (-5°C) 0.2 in

Powell has a seasonal temperature swing of 50°F / from 19°F in January to 69°F in July. Total annual precipitation is 7.9 inches, with May being the wettest month (1.5") and February the driest (0.2").

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