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Byron, WY

Full City Profile · Wyoming · Big Horn County County

3.1 /5.0
B Good
465 Population 511/sq mi density
$67,115 Median Income $31,103 per capita
$152,000 Home Value $217,322 Zillow
$1,025 Median Rent 12.0% income on rent
46°F Avg Temperature 293 sunny days/yr
123 Violent Crime/100K 738 property/100K
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$67,115 median income, 3.2% unemployment
A+
Affordability
5.0 / 5.0
$152,000 home value, $1,025/mo rent
F
Safety
1.0 / 5.0
123 violent crimes/100K
C
Education
2.1 / 5.0
14.0% bachelor's degree or higher
Byron 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. Annual precipitation totals 5.5 inches. The area receives 12.2 inches of snow annually. Air quality is rated Good with a median AQI of 34.

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

Elevation4,032 ft (1,229 m)
Area1.0 sq mi (2.5 km²)
Population Density511/sq mi
Coordinates44.7967°N, 108.5085°W
TimezoneAmerica/Denver
CountyBig Horn County County
Nearest AirportYellowstone Regional (COD)
32 miles away

Precipitation & Snow

Annual Rainfall 5.5"
86% below US avg
Snowfall 12.2"
Wettest Month (May) 1.50"
Driest Month (Feb) 0.20"

Air Quality

AQI Median34.0
RatingGood

Air Pollutants (EPA 2023)

Ozone (O₃)0.0457 ppm

Natural Hazard Risk

Overall RiskVery Low
Risk Score31.1 / 100
Social Vulnerability52.6 / 100
Community Resilience7.7 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Relatively Low
Wildfire Very Low
Flood Relatively Low
Hail Very Low
Strong Wind Very Low
Heat Wave Very Low
Winter Weather Relatively Low
Lightning Relatively Low
Ice Storm Very Low
Drought Relatively Low
Cold Wave Relatively Low
Landslide Relatively High
Volcano Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

99 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.2. Most recent: M2.6 on Mar 8, 2025.

May 11, 2022 36 km S of Silver Gate, Montana M4.2 118 km
Mar 25, 2008 35 km S of Silver Gate, Montana M4.2 120 km
Mar 29, 2023 56 km SSE of Mammoth, Wyoming M3.7 150 km
Jul 17, 2021 63 km SSE of Mammoth, Wyoming M3.6 150 km
Jul 20, 1992 52 km SSE of Mammoth, Wyoming M3.6 148 km
Jul 20, 1992 51 km SSE of Mammoth, Wyoming M3.5 149 km
Aug 7, 1991 31 km NNW of Pavillion, Wyoming M3.5 147 km
Jan 9, 2007 7 km ENE of East Thermopolis, Wyoming M3.5 130 km
Nov 16, 1993 17 km SSE of Ten Sleep, Wyoming M3.5 135 km
Jan 2, 2009 54 km SSE of Mammoth, Wyoming M3.5 149 km
Mar 4, 2019 35 km SSW of Silver Gate, Montana M3.3 125 km
Apr 5, 2002 7 km W of South Flat, Wyoming M3.3 100 km
Jan 9, 2009 42 km SSW of Silver Gate, Montana M3.3 138 km
Aug 16, 1992 47 km S of Silver Gate, Montana M3.2 120 km
Jul 21, 2023 Eastern Montana M3.2 83 km
Jul 3, 1994 25 km ESE of Mammoth, Wyoming M3.2 150 km
Nov 9, 2009 40 km SW of Silver Gate, Montana M3.1 140 km
Dec 16, 2012 40 km W of Owl Creek, Wyoming M3.1 121 km
Jan 2, 2009 52 km SSE of Mammoth, Wyoming M3.1 150 km
Mar 29, 2023 Wyoming M3.1 149 km
Source: USGS (M2.5+, 1990–2025)

Tornado History

47 tornadoes (EF0+) within 100 km since 1950. Strongest: EF3. Total: 1 fatality, 2 injuries.

Date Rating Distance Fatalities
Aug 2, 1985 EF3 44 km 0
Jun 16, 2010 EF2 45 km 0
Jul 11, 1978 EF2 29 km 0
Jul 4, 1978 EF2 52 km 0
Jul 24, 1967 EF2 55 km 0
Jun 26, 1964 EF2 20 km 0
Jul 9, 1962 EF2 52 km 0
Jun 12, 1962 EF2 36 km 0
Jun 26, 1959 EF2 83 km 1
Jun 3, 1958 EF2 65 km 0
Jun 1, 2009 EF1 83 km 0
Jun 26, 2001 EF1 51 km 0
Jun 6, 1997 EF1 44 km 0
May 18, 1991 EF1 33 km 0
May 24, 1990 EF1 38 km 0
Aug 25, 1986 EF1 48 km 0
Jun 15, 1984 EF1 90 km 0
Jul 24, 1981 EF1 11 km 0
Jun 18, 1978 EF1 21 km 0
Jul 4, 1976 EF1 60 km 0
Source: NOAA SPC (EF0+, 1950–2024)

Nearby Volcanoes

1 volcano within 200 km. Closest: Yellowstone (176 km).

Name Type Elevation Last Eruption Distance
Yellowstone Caldera(s) 2,805 m (9,203 ft) -1350 176 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Wildfire History

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

Year Name Acres Distance
2008 GUNBARREL 69,730 81 km
2018 TEREK 43,872 90 km
2021 ROBERTSON DRAW 31,132 63 km
1996 SHEPARD MTN 17,379 98 km
2007 BONE CREEK 12,776 70 km
2016 WHIT 12,731 80 km
2008 CASCADE 10,017 86 km
1999 ROOSTER 9,624 91 km
2021 CRATER RIDGE 8,147 62 km
2011 HOLE IN THE WALL 6,559 69 km
2006 BIRTHDAY2 6,553 85 km
2003 LITTLE HORN II 5,889 67 km
2003 DEEP LAKE 5,466 66 km
2002 COW CREEK 5,162 96 km
2002 RED WAFFLE 5,060 35 km
2005 BIG HORN 4,899 50 km
1991 ROBERTSON 4,812 62 km
2000 MIDDLECREE 4,534 98 km
2021 CROOKED CREEK 4,295 46 km
1994 UNNAMED 3,981 50 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 19°F (-7°C) 0.3 in Coldest
February 26°F (-3°C) 0.2 in Driest
March 36°F (2°C) 0.4 in
April 45°F (7°C) 0.7 in
May 55°F (13°C) 1.5 in Wettest
June 64°F (18°C) 1.3 in
July 74°F (23°C) 0.8 in Warmest
August 69°F (20°C) 0.6 in
September 58°F (14°C) 0.9 in
October 46°F (8°C) 0.7 in
November 31°F (-1°C) 0.3 in
December 21°F (-6°C) 0.3 in

Byron has a seasonal temperature swing of 55°F / from 19°F in January to 74°F in July. Total annual precipitation is 8.0 inches, with May being the wettest month (1.5") and February the driest (0.2").

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