Weather & Climate in Bairoil, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Bairoil has a cool climate with an average annual temperature of 45°F (7°C). Winters average 23°F in January while summers reach 71°F in July. Annual precipitation totals 9.9 inches (drier than the 38-inch national average). The area receives 60.2 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 8 / among the cleanest air in the country. 100% of days have good air quality. The city sits at an elevation of 6,853 feet.
Temperature
23°F Jan (-5°C)
71°F Jul (21°C)
| Annual Average | 45.4°F |
| 16% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 71°F (21°C) |
Geography
| Elevation | 6,853 ft (2,089 m) |
| Area | 1.4 sq mi (3.7 km²) |
| Population Density | 112/sq mi |
| Coordinates | 42.2372°N, 107.5610°W |
| Timezone | America/Denver |
| County | Carbon County County |
| Nearest Airport | Casper/Natrona County International (CPR) 72 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 8.0 |
| Rating | Good |
| Good Days % | 100.0% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 42.7 / 100 |
| Social Vulnerability | 47.8 / 100 |
| Community Resilience | 25.6 / 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 Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
75 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 | 89 km | 10 km |
| May 26, 2000 | 5 km S of Bairoil, Wyoming | M4.0 | 5 km | 5 km |
| Nov 3, 2017 | 57 km S of Ten Sleep, Wyoming | M4.0 | 143 km | 17 km |
| Oct 10, 1992 | 25 km SSE of Riverton, Wyoming | M4.0 | 85 km | 5 km |
| Apr 13, 2021 | 51 km S of Ten Sleep, Wyoming | M3.9 | 149 km | 12 km |
| Mar 19, 2022 | 5 km NW of Ryan Park, Wyoming | M3.8 | 129 km | 11 km |
| Feb 13, 2023 | Wyoming | M3.7 | 146 km | 10 km |
| Oct 10, 1993 | 41 km W of Esterbrook, Wyoming | M3.7 | 141 km | 5 km |
| May 17, 2009 | 24 km WNW of Jeffrey City, Wyoming | M3.7 | 57 km | 5 km |
| Jun 1, 1993 | 6 km N of Bairoil, Wyoming | M3.7 | 8 km | 5 km |
| Feb 1, 2003 | 11 km E of Antelope Hills, Wyoming | M3.7 | 147 km | 5 km |
| Oct 21, 1996 | 42 km ESE of Boulder, Wyoming | M3.7 | 145 km | 5 km |
| Aug 6, 1998 | 18 km NNE of Rawlins, Wyoming | M3.6 | 44 km | 10 km |
| Jun 2, 2023 | 9 km SSE of Saratoga, Wyoming | M3.6 | 116 km | 1 km |
| Jun 30, 1998 | 8 km NNW of Point of Rocks, Wyoming | M3.6 | 118 km | 6 km |
| Aug 13, 2004 | 35 km SW of Alcova, Wyoming | M3.5 | 50 km | 5 km |
| Oct 8, 2009 | 31 km SSW of Alcova, Wyoming | M3.4 | 56 km | 5 km |
| Sep 14, 2024 | 9 km SSE of Saratoga, Wyoming | M3.4 | 116 km | 10 km |
| Jan 19, 2022 | 8 km ESE of Saratoga, Wyoming | M3.3 | 114 km | 5 km |
| May 4, 2015 | 5 km SSW of Encampment, Wyoming | M3.3 | 134 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
27 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1.
| Date | Rating | Distance | Path | Fatalities |
| Jul 7, 1988 | EF1 | 70 km | 0.5 mi | 0 |
| Aug 3, 1976 | EF1 | 96 km | 0.1 mi | 0 |
| May 29, 1964 | EF1 | 40 km | 0.5 mi | 0 |
| Jun 12, 1962 | EF1 | 62 km | 1.0 mi | 0 |
| Jul 20, 1958 | EF1 | 33 km | 1.9 mi | 0 |
| May 28, 2018 | EF0 | 99 km | 0.5 mi | 0 |
| May 26, 2017 | EF0 | 97 km | 11.4 mi | 0 |
| Jul 7, 2015 | EF0 | 80 km | 0.1 mi | 0 |
| Aug 12, 2013 | EF0 | 74 km | 0.1 mi | 0 |
| Jun 3, 2009 | EF0 | 38 km | 0.9 mi | 0 |
| Jun 26, 2001 | EF0 | 78 km | 0.2 mi | 0 |
| Aug 10, 1997 | EF0 | 54 km | 1.0 mi | 0 |
| Jun 8, 1997 | EF0 | 84 km | 0.1 mi | 0 |
| Jun 6, 1997 | EF0 | 56 km | 0.1 mi | 0 |
| May 25, 1995 | EF0 | 37 km | 0.5 mi | 0 |
| May 25, 1995 | EF0 | 82 km | 0.5 mi | 0 |
| Jun 7, 1991 | EF0 | 100 km | 0.5 mi | 0 |
| Jul 8, 1988 | EF0 | 88 km | 0.5 mi | 0 |
| Jun 13, 1984 | EF0 | 99 km | 0.5 mi | 0 |
| Jun 14, 1982 | EF0 | 45 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
16 wildfires (100+ acres) recorded within 100 km. Largest: PEDRO MOUNTAIN (21,904 acres, 2019).
| Year | Name | Acres Burned | Distance |
| 2019 | PEDRO MOUNTAIN | 21,904 | 62 km |
| 2020 | RR 316 | 14,274 | 93 km |
| 2012 | BEAR MOUNTAIN COMPLEX | 8,196 | 33 km |
| 1985 | GOAT MTN | 6,450 | 64 km |
| 1999 | JEP | 4,647 | 75 km |
| 2012 | SEMINOE | 3,570 | 54 km |
| 1993 | DUNES | 3,161 | 91 km |
| 2006 | POISON SPIDER | 3,063 | 65 km |
| 2011 | TB35 MARKING PEN CREEK | 2,448 | 52 km |
| 2001 | BEAVER RIM | 2,171 | 84 km |
| 2020 | BRADLEY | 1,901 | 47 km |
| 1992 | STRATTON | 1,728 | 9 km |
| 1999 | MONUMENT | 1,669 | 89 km |
| 2000 | MURPHYDRAW | 1,615 | 94 km |
| 2000 | RED CANYON | 1,500 | 98 km |
| 2011 | FERRIS MOUNTAIN | 1,464 | 26 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 0.4 in | Coldest, Driest |
| February | 26°F (-3°C) | 0.5 in | |
| March | 35°F (2°C) | 0.8 in | |
| April | 43°F (6°C) | 1.4 in | |
| May | 53°F (12°C) | 2.0 in | Wettest |
| June | 62°F (17°C) | 1.0 in | |
| July | 71°F (21°C) | 0.7 in | Warmest |
| August | 69°F (20°C) | 0.5 in | |
| September | 59°F (15°C) | 0.8 in | |
| October | 46°F (8°C) | 0.9 in | |
| November | 33°F (0°C) | 0.5 in | |
| December | 24°F (-5°C) | 0.5 in |
Bairoil has a seasonal temperature swing of 47°F / from 23°F in January to 71°F in July. Total annual precipitation is 9.9 inches, with May being the wettest month (2.0") and January the driest (0.4").