Weather & Climate in Alpine, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Alpine has a cool climate with an average annual temperature of 39°F (4°C). Winters average 17°F in January while summers reach 62°F in July. Annual precipitation totals 25.3 inches (drier than the 38-inch national average). The area receives 78.2 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 5,730 feet.
Temperature
17°F Jan (-8°C)
62°F Jul (16°C)
| Annual Average | 38.6°F |
| 29% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 62°F (16°C) |
Geography
| Elevation | 5,730 ft (1,747 m) |
| Area | 0.7 sq mi (1.8 km²) |
| Population Density | 968/sq mi |
| Coordinates | 43.1604°N, 111.0148°W |
| Timezone | America/Denver |
| County | Bonneville County County |
| Nearest Airport | Jackson Hole (JAC) 34 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 82.4 / 100 |
| Social Vulnerability | 12.2 / 100 |
| Community Resilience | 92.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Moderate |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,370 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.
| Feb 3, 1994 | 4 km SSE of Auburn, Wyoming | M5.8 | 44 km | 8 km |
| Sep 2, 2017 | 12 km E of Soda Springs, Idaho | M5.3 | 67 km | 10 km |
| Apr 21, 2001 | 29 km WSW of Freedom, Idaho | M5.3 | 41 km | 1 km |
| Sep 10, 2017 | 9 km NNW of Georgetown, Idaho | M5.0 | 74 km | 10 km |
| Jan 7, 2004 | 20 km ESE of Kelly, Wyoming | M5.0 | 69 km | 3 km |
| Aug 5, 2010 | 19 km E of Kelly, Wyoming | M4.8 | 70 km | 5 km |
| Feb 11, 1994 | 3 km SSE of Auburn, Wyoming | M4.8 | 44 km | 5 km |
| Aug 27, 2016 | 4 km ENE of Bondurant, Wyoming | M4.8 | 54 km | 12 km |
| Sep 3, 2017 | 15 km ESE of Soda Springs, Idaho | M4.7 | 70 km | 10 km |
| Feb 4, 1994 | 4 km WNW of Fairview, Wyoming | M4.7 | 50 km | 5 km |
| Sep 10, 2017 | 12 km ESE of Soda Springs, Idaho | M4.7 | 72 km | 5 km |
| Sep 11, 2017 | 9 km NW of Georgetown, Idaho | M4.7 | 77 km | 8 km |
| Sep 3, 2017 | 10 km E of Soda Springs, Idaho | M4.7 | 69 km | 8 km |
| Dec 28, 1993 | 38 km NE of Bondurant, Wyoming | M4.7 | 80 km | 8 km |
| Sep 6, 2017 | 11 km NNW of Georgetown, Idaho | M4.6 | 74 km | 10 km |
| Feb 7, 1994 | 4 km SW of Fairview, Wyoming | M4.5 | 56 km | 5 km |
| Sep 4, 2017 | 13 km ESE of Soda Springs, Idaho | M4.5 | 70 km | 6 km |
| Feb 3, 1994 | 13 km WSW of Auburn, Wyoming | M4.4 | 49 km | 5 km |
| Feb 10, 1994 | 3 km WSW of Auburn, Wyoming | M4.4 | 42 km | 5 km |
| Nov 10, 1992 | 32 km WNW of Freedom, Idaho | M4.4 | 34 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
34 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 2 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 21, 1987 | EF4 | 99 km | 24.3 mi | 0 |
| Jun 12, 2022 | EF2 | 62 km | 2.1 mi | 0 |
| Apr 7, 1978 | EF2 | 90 km | 1.5 mi | 0 |
| Sep 4, 2016 | EF1 | 63 km | 2.4 mi | 0 |
| Feb 14, 2000 | EF1 | 92 km | 12.0 mi | 0 |
| Feb 14, 2000 | EF1 | 95 km | 9.0 mi | 0 |
| Jun 4, 1991 | EF1 | 81 km | 0.2 mi | 0 |
| Apr 17, 1988 | EF1 | 81 km | 0.5 mi | 0 |
| May 15, 1984 | EF1 | 93 km | 8.0 mi | 0 |
| Apr 21, 1981 | EF1 | 96 km | 1.1 mi | 0 |
| Jul 24, 1980 | EF1 | 49 km | 0.1 mi | 0 |
| Jul 8, 1980 | EF1 | 84 km | 0.1 mi | 0 |
| Jun 20, 1977 | EF1 | 98 km | 2.0 mi | 0 |
| Jul 30, 1975 | EF1 | 78 km | 0.1 mi | 0 |
| Mar 13, 1959 | EF1 | 92 km | 0.4 mi | 0 |
| Jun 23, 2023 | EF0 | 81 km | 0.2 mi | 0 |
| Jun 2, 2019 | EF0 | 64 km | 1.0 mi | 0 |
| Apr 26, 2019 | EF0 | 100 km | 0.1 mi | 0 |
| Nov 17, 2017 | EF0 | 80 km | 5.0 mi | 0 |
| Jul 31, 2016 | EF0 | 69 km | 1.7 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Hell's Half Acre (122 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Hell's Half Acre | Shield | 1,631 m (5,351 ft) | -3250 | 122 km |
| Yellowstone | Caldera(s) | 2,805 m (9,203 ft) | -1350 | 144 km |
| Wapi Lava Field | Shield | 1,604 m (5,262 ft) | -300 | 182 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: FONTENELLE (58,125 acres, 2012).
| Year | Name | Acres Burned | Distance |
| 2012 | FONTENELLE | 58,125 | 81 km |
| 2018 | ROOSEVELT | 55,330 | 52 km |
| 2016 | HENRYS CREEK | 52,988 | 69 km |
| 2016 | CLIFF CREEK | 36,131 | 53 km |
| 1992 | SAGEHEN | 26,663 | 87 km |
| 2006 | PURDY | 18,653 | 90 km |
| 2012 | RIDGE TOP | 17,793 | 92 km |
| 2008 | NEW FORK | 14,481 | 94 km |
| 2011 | RED ROCK COMPLEX | 10,046 | 69 km |
| 1998 | BUCKSKIN | 10,032 | 100 km |
| 2016 | LONE PINE | 9,009 | 94 km |
| 2005 | SAWMILL | 8,694 | 94 km |
| 2007 | HORSE CREEK | 8,149 | 54 km |
| 1988 | TRAIL CREEK | 7,965 | 18 km |
| 2000 | BLIND TRAIL | 7,758 | 31 km |
| 1991 | DRY COTTONWOOD | 6,996 | 81 km |
| 2007 | BLACK HAWK | 6,407 | 77 km |
| 2018 | MARTEN CREEK | 6,383 | 58 km |
| 1991 | GARDEN PK | 5,649 | 85 km |
| 2010 | BULL | 5,496 | 43 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 2.5 in | Coldest |
| February | 20°F (-7°C) | 2.5 in | |
| March | 29°F (-2°C) | 2.3 in | |
| April | 37°F (3°C) | 2.3 in | |
| May | 47°F (8°C) | 3.1 in | Wettest |
| June | 54°F (12°C) | 2.2 in | |
| July | 62°F (16°C) | 1.1 in | Warmest, Driest |
| August | 60°F (16°C) | 1.3 in | |
| September | 52°F (11°C) | 1.7 in | |
| October | 41°F (5°C) | 2.1 in | |
| November | 28°F (-2°C) | 2.1 in | |
| December | 18°F (-8°C) | 2.1 in |
Alpine has a seasonal temperature swing of 44°F / from 17°F in January to 62°F in July. Total annual precipitation is 25.3 inches, with May being the wettest month (3.1") and July the driest (1.1").