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Weather & Climate in Wamsutter, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wamsutter has a cool climate with an average annual temperature of 42°F (6°C). Winters average 19°F in January while summers reach 68°F in July. The area gets 322 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 8.5 inches (drier than the 38-inch national average). The area receives 50.8 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 6,712 feet.
Temperature
19°F Jan (-7°C)
68°F Jul (20°C)
| Annual Average | 42.3°F |
| 22% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 322 days/yr |
Geography
| Elevation | 6,712 ft (2,046 m) |
| Area | 1.5 sq mi (3.8 km²) |
| Population Density | 126/sq mi |
| Coordinates | 41.6680°N, 107.9791°W |
| Timezone | America/Denver |
| County | Sweetwater County County |
| Nearest Airport | Southwest Wyoming Regional (RKS) 56 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 30.6 / 100 |
| Social Vulnerability | 19.3 / 100 |
| Community Resilience | 16.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | No Rating |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
81 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.
| Apr 6, 1999 | 31 km SE of Wamsutter, Wyoming | M4.3 | 31 km | 10 km |
| Jan 30, 2000 | 8 km ESE of Little America, Wyoming | M4.3 | 150 km | 5 km |
| Oct 10, 1992 | 25 km SSE of Riverton, Wyoming | M4.0 | 130 km | 5 km |
| May 26, 2000 | 5 km S of Bairoil, Wyoming | M4.0 | 68 km | 5 km |
| Mar 19, 2022 | 5 km NW of Ryan Park, Wyoming | M3.8 | 123 km | 11 km |
| Aug 18, 2009 | 19 km N of Craig, Colorado | M3.7 | 114 km | 5 km |
| Jun 1, 1993 | 6 km N of Bairoil, Wyoming | M3.7 | 78 km | 5 km |
| Oct 21, 1996 | 42 km ESE of Boulder, Wyoming | M3.7 | 145 km | 5 km |
| May 17, 2009 | 24 km WNW of Jeffrey City, Wyoming | M3.7 | 98 km | 5 km |
| Aug 6, 1998 | 18 km NNE of Rawlins, Wyoming | M3.6 | 73 km | 10 km |
| Jun 2, 2023 | 9 km SSE of Saratoga, Wyoming | M3.6 | 106 km | 1 km |
| Jun 30, 1998 | 8 km NNW of Point of Rocks, Wyoming | M3.6 | 71 km | 6 km |
| Jun 25, 1994 | 12 km NE of Little America, Wyoming | M3.6 | 146 km | -3 km |
| Aug 13, 2004 | 35 km SW of Alcova, Wyoming | M3.5 | 109 km | 5 km |
| Apr 20, 2017 | 24 km NE of Maybell, Colorado | M3.5 | 111 km | 13 km |
| Sep 14, 2024 | 9 km SSE of Saratoga, Wyoming | M3.4 | 107 km | 10 km |
| Oct 8, 2009 | 31 km SSW of Alcova, Wyoming | M3.4 | 115 km | 5 km |
| Jun 3, 2023 | 8 km SSE of Saratoga, Wyoming | M3.3 | 105 km | 12 km |
| Aug 26, 2022 | 27 km E of Bairoil, Wyoming | M3.3 | 88 km | 5 km |
| May 4, 2015 | 5 km SSW of Encampment, Wyoming | M3.3 | 112 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
22 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1.
| Date | Rating | Distance | Path | Fatalities |
| Jul 31, 1978 | EF1 | 99 km | 1.0 mi | 0 |
| May 29, 1964 | EF1 | 74 km | 0.5 mi | 0 |
| May 28, 2018 | EF0 | 98 km | 0.5 mi | 0 |
| May 26, 2017 | EF0 | 37 km | 11.4 mi | 0 |
| Jul 7, 2015 | EF0 | 15 km | 0.1 mi | 0 |
| Jun 3, 2009 | EF0 | 70 km | 0.9 mi | 0 |
| Jun 24, 2003 | EF0 | 49 km | — | 0 |
| Aug 10, 1997 | EF0 | 70 km | 1.0 mi | 0 |
| Jun 8, 1997 | EF0 | 86 km | 0.1 mi | 0 |
| Jun 6, 1997 | EF0 | 99 km | 0.1 mi | 0 |
| May 25, 1995 | EF0 | 18 km | 0.5 mi | 0 |
| May 25, 1995 | EF0 | 71 km | 0.5 mi | 0 |
| Aug 2, 1992 | EF0 | 93 km | 0.1 mi | 0 |
| May 15, 1992 | EF0 | 97 km | 0.1 mi | 0 |
| May 30, 1989 | EF0 | 83 km | 0.5 mi | 0 |
| Jun 14, 1982 | EF0 | 66 km | 0.1 mi | 0 |
| Jun 14, 1982 | EF0 | 26 km | 0.1 mi | 0 |
| Aug 14, 1979 | EF0 | 65 km | 0.1 mi | 0 |
| Aug 14, 1979 | EF0 | 28 km | 0.1 mi | 0 |
| Aug 14, 1979 | EF0 | 20 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
19 wildfires (100+ acres) recorded within 100 km. Largest: MAYBERRY (26,520 acres, 2008).
| Year | Name | Acres Burned | Distance |
| 2008 | MAYBERRY | 26,520 | 94 km |
| 2018 | LANEY RIM | 11,589 | 98 km |
| 2012 | BEAR MOUNTAIN COMPLEX | 8,196 | 93 km |
| 1999 | JEP | 4,647 | 44 km |
| 2006 | DIVIDE | 3,332 | 95 km |
| 1993 | DUNES | 3,161 | 44 km |
| 2018 | BLACK BUTTE | 3,124 | 70 km |
| 2000 | GREASEWOOD | 2,777 | 90 km |
| 2007 | MUD SPRINGS | 2,613 | 93 km |
| 1993 | BIG GULCH | 2,603 | 89 km |
| 2000 | SAGE CREEK 3 | 2,228 | 68 km |
| 1992 | STRATTON | 1,728 | 77 km |
| 1999 | MONUMENT | 1,669 | 47 km |
| 2011 | FERRIS MOUNTAIN | 1,464 | 89 km |
| 2009 | SPRING | 1,451 | 94 km |
| 1999 | BATTLE CREEK | 1,423 | 96 km |
| 2012 | ACE | 1,356 | 88 km |
| 1998 | SHIPPING | 1,254 | 61 km |
| 1994 | DIVIDE | 1,104 | 94 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 | 21°F (-6°C) | 0.2 in | Driest |
| March | 30°F (-1°C) | 0.4 in | |
| April | 38°F (4°C) | 0.8 in | |
| May | 47°F (9°C) | 1.0 in | Wettest |
| June | 58°F (14°C) | 0.9 in | |
| July | 68°F (20°C) | 0.9 in | Warmest |
| August | 65°F (18°C) | 0.8 in | |
| September | 57°F (14°C) | 0.9 in | |
| October | 45°F (7°C) | 0.8 in | |
| November | 31°F (-1°C) | 0.4 in | |
| December | 22°F (-6°C) | 0.4 in |
Wamsutter has a seasonal temperature swing of 49°F / from 19°F in January to 68°F in July. Total annual precipitation is 7.7 inches, with May being the wettest month (1.0") and February the driest (0.2").