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Weather & Climate in Frannie, WY

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

Frannie 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 4,220 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

Elevation4,220 ft (1,286 m)
Area0.4 sq mi (1.1 km²)
Population Density491/sq mi
Coordinates44.9710°N, 108.6205°W
TimezoneAmerica/Denver
CountyCarbon County County
Nearest AirportYellowstone Regional (COD)
37 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

135 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 M3.7 146 km 4 km
Sep 24, 1994 39 km SSE of Mammoth, Wyoming M3.7 150 km 5 km
Jul 17, 2021 63 km SSE of Mammoth, Wyoming M3.6 148 km 6 km
Jul 20, 1992 52 km SSE of Mammoth, Wyoming M3.6 144 km 0 km
Jul 20, 1992 51 km SSE of Mammoth, Wyoming M3.5 145 km 2 km
Jan 2, 2009 54 km SSE of Mammoth, Wyoming M3.5 145 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 M3.3 122 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 M3.2 117 km 5 km
Jul 21, 2023 Eastern Montana M3.2 62 km 5 km
Jul 3, 1994 25 km ESE of Mammoth, Wyoming M3.2 141 km 11 km
Jul 16, 2021 64 km ESE of West Yellowstone, Montana M3.2 148 km 7 km
Sep 29, 1998 63 km SSE of Mammoth, Wyoming M3.2 148 km 7 km
Jul 16, 2021 64 km ESE of West Yellowstone, Montana M3.1 148 km 7 km
Nov 9, 2009 40 km SW of Silver Gate, Montana M3.1 134 km 6 km
Dec 16, 2012 40 km W of Owl Creek, Wyoming M3.1 136 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

55 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 5 injuries.

Date Rating Distance Path Fatalities
Aug 2, 1985 EF3 55 km 0.2 mi 0
Jun 16, 1965 EF3 93 km 20.6 mi 0
Jun 20, 2010 EF2 94 km 0.7 mi 0
Jun 16, 2010 EF2 24 km 1.0 mi 0
Jul 11, 1978 EF2 37 km 0.4 mi 0
Jul 4, 1978 EF2 72 km 5.0 mi 0
Jul 24, 1967 EF2 76 km 0.1 mi 0
Jun 26, 1964 EF2 27 km 1.0 mi 0
Jul 9, 1962 EF2 74 km 0.5 mi 0
Jun 12, 1962 EF2 57 km 0.5 mi 0
Jun 26, 1959 EF2 100 km 9.2 mi 1
Jul 2, 1958 EF2 93 km 0.5 mi 0
Jun 3, 1958 EF2 83 km 0.2 mi 0
Jun 26, 2001 EF1 71 km 0.7 mi 0
Jun 6, 1997 EF1 63 km 1.0 mi 0
Jun 21, 1991 EF1 92 km 0.2 mi 0
May 18, 1991 EF1 34 km 0.2 mi 0
May 24, 1990 EF1 16 km 0.2 mi 0
Aug 25, 1986 EF1 57 km 1.0 mi 0
Jun 15, 1984 EF1 98 km 1.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

1 volcano within 200 km. Closest: Yellowstone (173 km).

Name Type Elevation Last Eruption Distance
Yellowstone Caldera(s) 2,805 m (9,203 ft) -1350 173 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 82 km
2021 ROBERTSON DRAW 31,132 47 km
1996 SHEPARD MTN 17,379 82 km
2007 BONE CREEK 12,776 85 km
2016 WHIT 12,731 86 km
2008 CASCADE 10,017 70 km
2010 STUMP GULCH 8,873 99 km
1996 COLFAX 8,429 97 km
2021 CRATER RIDGE 8,147 68 km
2011 HOLE IN THE WALL 6,559 56 km
2006 BIRTHDAY2 6,553 77 km
2017 MICROWAVE 5,958 91 km
2003 LITTLE HORN II 5,889 73 km
2003 DEEP LAKE 5,466 57 km
2002 COW CREEK 5,162 75 km
2002 RED WAFFLE 5,060 21 km
2005 BIG HORN 4,899 45 km
1991 ROBERTSON 4,812 48 km
2000 PEASE 4,361 90 km
2021 CROOKED CREEK 4,295 32 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

Frannie 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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