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Weather & Climate in Deaver, WY

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

Deaver experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 19°F in January while summers reach 74°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 5.5 inches (drier than the 38-inch national average). The area receives 12.2 inches of snow annually. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 4,113 feet.

Temperature

19°F Jan (-7°C) 74°F Jul (23°C)
Annual Average46.1°F
15% below US avg
January Average19°F (-7°C)
July Average74°F (23°C)
Sunny Days293 days/yr

Geography

Elevation4,113 ft (1,254 m)
Area1.0 sq mi (2.6 km²)
Population Density170/sq mi
Coordinates44.8890°N, 108.5960°W
TimezoneAmerica/Denver
CountyCarbon County County
Nearest AirportYellowstone Regional (COD)
33 miles away

Precipitation & Snow

Annual Rainfall 5.5"
86% below US avg
Snowfall 12.2"
Wettest Month (May) 1.85"
Driest Month (Feb) 0.28"

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

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

May 11, 2022 36 km S of Silver Gate, Montana M4.2 113 km 14 km
Mar 25, 2008 35 km S of Silver Gate, Montana M4.2 114 km 4 km
Mar 29, 2023 56 km SSE of Mammoth, Wyoming M3.7 145 km 4 km
Jul 17, 2021 63 km SSE of Mammoth, Wyoming M3.6 146 km 6 km
Jul 20, 1992 52 km SSE of Mammoth, Wyoming M3.6 143 km 0 km
Jul 20, 1992 51 km SSE of Mammoth, Wyoming M3.5 144 km 2 km
Jan 9, 2007 7 km ENE of East Thermopolis, Wyoming M3.5 142 km 5 km
Nov 16, 1993 17 km SSE of Ten Sleep, Wyoming M3.5 148 km 5 km
Jan 2, 2009 54 km SSE of Mammoth, Wyoming M3.5 144 km 7 km
Mar 4, 2019 35 km SSW of Silver Gate, Montana M3.3 119 km 6 km
Jan 9, 2009 42 km SSW of Silver Gate, Montana M3.3 133 km 7 km
Apr 5, 2002 7 km W of South Flat, Wyoming M3.3 112 km 5 km
Mar 19, 1993 40 km SSE of Mammoth, Wyoming M3.3 149 km 2 km
Aug 16, 1992 47 km S of Silver Gate, Montana M3.2 116 km 5 km
Jul 21, 2023 Eastern Montana M3.2 71 km 5 km
Jul 3, 1994 25 km ESE of Mammoth, Wyoming M3.2 142 km 11 km
Jul 16, 2021 64 km ESE of West Yellowstone, Montana M3.2 147 km 7 km
Sep 29, 1998 63 km SSE of Mammoth, Wyoming M3.2 147 km 7 km
Jul 16, 2021 64 km ESE of West Yellowstone, Montana M3.1 147 km 7 km
Nov 9, 2009 40 km SW of Silver Gate, Montana M3.1 134 km 6 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

48 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 3 injuries.

Date Rating Distance Path Fatalities
Aug 2, 1985 EF3 51 km 0.2 mi 0
Jun 16, 2010 EF2 33 km 1.0 mi 0
Jul 11, 1978 EF2 31 km 0.4 mi 0
Jul 4, 1978 EF2 64 km 5.0 mi 0
Jul 24, 1967 EF2 67 km 0.1 mi 0
Jun 26, 1964 EF2 20 km 1.0 mi 0
Jul 9, 1962 EF2 65 km 0.5 mi 0
Jun 12, 1962 EF2 48 km 0.5 mi 0
Jun 26, 1959 EF2 93 km 9.2 mi 1
Jun 3, 1958 EF2 76 km 0.2 mi 0
Jun 1, 2009 EF1 95 km 0.4 mi 0
Jun 26, 2001 EF1 63 km 0.7 mi 0
Jun 6, 1997 EF1 56 km 1.0 mi 0
May 18, 1991 EF1 30 km 0.2 mi 0
May 24, 1990 EF1 25 km 0.2 mi 0
Aug 25, 1986 EF1 51 km 1.0 mi 0
Jun 15, 1984 EF1 96 km 1.0 mi 0
Jul 24, 1981 EF1 18 km 0.1 mi 0
Jun 18, 1978 EF1 28 km 0.1 mi 0
Jul 4, 1976 EF1 72 km 0.2 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

1 volcano within 200 km. Closest: Yellowstone (172 km).

Name Type Elevation Last Eruption Distance
Yellowstone Caldera(s) 2,805 m (9,203 ft) -1350 172 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: GUNBARREL (69,730 acres, 2008).

Year Name Acres Burned Distance
2008 GUNBARREL 69,730 79 km
2021 ROBERTSON DRAW 31,132 52 km
1996 SHEPARD MTN 17,379 87 km
2007 BONE CREEK 12,776 80 km
2016 WHIT 12,731 81 km
2008 CASCADE 10,017 75 km
1999 ROOSTER 9,624 99 km
2021 CRATER RIDGE 8,147 67 km
2011 HOLE IN THE WALL 6,559 59 km
2006 BIRTHDAY2 6,553 81 km
2017 MICROWAVE 5,958 97 km
2003 LITTLE HORN II 5,889 72 km
2003 DEEP LAKE 5,466 58 km
2002 COW CREEK 5,162 84 km
2002 RED WAFFLE 5,060 28 km
2005 BIG HORN 4,899 48 km
1991 ROBERTSON 4,812 52 km
2000 PEASE 4,361 98 km
2021 CROOKED CREEK 4,295 39 km
1994 UNNAMED 3,981 39 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 19°F (-7°C) 0.4 in Coldest
February 26°F (-3°C) 0.3 in Driest
March 36°F (2°C) 0.6 in
April 45°F (7°C) 0.9 in
May 55°F (13°C) 1.9 in Wettest
June 64°F (18°C) 1.5 in
July 74°F (23°C) 0.9 in Warmest
August 69°F (21°C) 0.7 in
September 58°F (14°C) 1.1 in
October 46°F (8°C) 0.8 in
November 31°F (-1°C) 0.4 in
December 21°F (-6°C) 0.4 in

Deaver has a seasonal temperature swing of 55°F / from 19°F in January to 74°F in July. Total annual precipitation is 9.8 inches, with May being the wettest month (1.9") and February the driest (0.3").

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