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Weather & Climate in Boyd, MT

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

Boyd has a cool climate with an average annual temperature of 44°F (7°C). Winters average 23°F in January while summers reach 68°F in July. The area gets 311 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 14.5 inches (drier than the 38-inch national average). The area receives 50.9 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 26 / among the cleanest air in the country. The city sits at an elevation of 4,069 feet.

Temperature

23°F Jan (-5°C) 68°F Jul (20°C)
Annual Average43.7°F
19% below US avg
January Average23°F (-5°C)
July Average68°F (20°C)
Sunny Days311 days/yr

Geography

Elevation4,069 ft (1,240 m)
Area0.2 sq mi (0.6 km²)
Population Density93/sq mi
Coordinates45.4541°N, 109.0697°W
TimezoneAmerica/Denver
CountyCarbon County County
Nearest AirportBillings Logan International (BIL)
35 miles away

Precipitation & Snow

Annual Rainfall 14.5"
62% below US avg
Snowfall 50.9"
Wettest Month (May) 2.80"
Driest Month (Feb) 0.59"

Air Quality

AQI Median26.0
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

145 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.

Mar 30, 2014 22 km S of Mammoth, Wyoming M4.8 148 km 6 km
May 11, 2022 36 km S of Silver Gate, Montana M4.2 113 km 14 km
Nov 24, 2000 24 km S of Mammoth, Wyoming M4.2 150 km 9 km
Mar 25, 2008 35 km S of Silver Gate, Montana M4.2 113 km 4 km
Jan 30, 2023 9 km NNW of Livingston, Montana M3.8 123 km 20 km
Mar 29, 2023 56 km SSE of Mammoth, Wyoming M3.7 145 km 4 km
Jan 9, 2003 23 km E of Wilsall, Montana M3.7 118 km 11 km
Sep 24, 1994 39 km SSE of Mammoth, Wyoming M3.7 141 km 5 km
Mar 30, 2014 21 km S of Mammoth, Wyoming M3.7 150 km 3 km
Jul 17, 2021 63 km SSE of Mammoth, Wyoming M3.6 149 km 6 km
Jul 6, 2021 27 km SSE of Melstone, Montana M3.6 144 km 10 km
Jul 20, 1992 52 km SSE of Mammoth, Wyoming M3.6 141 km 0 km
Mar 30, 2014 Wyoming M3.6 148 km 4 km
Jul 20, 1992 51 km SSE of Mammoth, Wyoming M3.5 141 km 2 km
Nov 24, 2000 25 km S of Mammoth, Wyoming M3.5 150 km 8 km
Jan 2, 2009 54 km SSE of Mammoth, Wyoming M3.5 143 km 7 km
Jan 12, 2014 23 km SE of Mammoth, Wyoming M3.4 135 km 9 km
Mar 30, 2014 22 km S of Mammoth, Wyoming M3.4 148 km 4 km
Mar 30, 2014 20 km S of Mammoth, Wyoming M3.4 148 km 5 km
Mar 4, 2019 35 km SSW of Silver Gate, Montana M3.3 116 km 6 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

37 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 3 injuries.

Date Rating Distance Path Fatalities
Jun 16, 1965 EF3 59 km 20.6 mi 0
Jun 20, 2010 EF2 61 km 0.7 mi 0
Jun 16, 2010 EF2 43 km 1.0 mi 0
Jul 11, 1978 EF2 89 km 0.4 mi 0
Jun 26, 1964 EF2 82 km 1.0 mi 0
Jul 2, 1958 EF2 60 km 0.5 mi 0
Jun 21, 1991 EF1 54 km 0.2 mi 0
May 18, 1991 EF1 79 km 0.2 mi 0
May 24, 1990 EF1 76 km 0.2 mi 0
May 24, 1990 EF1 48 km 0.2 mi 0
Jul 24, 1981 EF1 88 km 0.1 mi 0
Jun 18, 1978 EF1 95 km 0.1 mi 0
Jun 26, 1976 EF1 81 km 2.0 mi 0
Aug 22, 1965 EF1 82 km 1.5 mi 0
Aug 12, 1958 EF1 35 km 0.5 mi 0
Jul 6, 1955 EF1 76 km 2.0 mi 0
May 24, 2014 EF0 77 km 0.8 mi 0
Jun 6, 2011 EF0 47 km 0.0 mi 0
Jun 6, 2011 EF0 73 km 0.3 mi 0
Aug 11, 2005 EF0 46 km 9.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

1 volcano within 200 km. Closest: Yellowstone (170 km).

Name Type Elevation Last Eruption Distance
Yellowstone Caldera(s) 2,805 m (9,203 ft) -1350 170 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: DERBY (200,993 acres, 2006).

Year Name Acres Burned Distance
2006 DERBY 200,993 60 km
1988 STORM CREEK 116,027 81 km
2003 HOBBLE 38,365 62 km
2021 ROBERTSON DRAW 31,132 43 km
2006 JUNGLE 23,846 98 km
2012 DAHL 21,448 100 km
1996 SHEPARD MTN 17,379 49 km
1994 BLACK BUTTE 10,231 73 km
2008 CASCADE 10,017 45 km
2010 STUMP GULCH 8,873 35 km
2021 TROUT CREEK 7,804 46 km
2011 HOLE IN THE WALL 6,559 54 km
2006 BIRTHDAY2 6,553 94 km
2017 MICROWAVE 5,958 100 km
2003 DEEP LAKE 5,466 65 km
2002 COW CREEK 5,162 12 km
2002 RED WAFFLE 5,060 64 km
2005 BIG HORN 4,899 82 km
1991 ROBERTSON 4,812 50 km
2000 PEASE 4,361 69 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 23°F (-5°C) 0.8 in Coldest
February 28°F (-2°C) 0.6 in Driest
March 36°F (2°C) 1.1 in
April 44°F (7°C) 1.8 in
May 53°F (12°C) 2.8 in Wettest
June 62°F (17°C) 2.1 in
July 68°F (20°C) 1.1 in
August 68°F (20°C) 1.1 in Warmest
September 58°F (14°C) 1.5 in
October 47°F (8°C) 1.3 in
November 33°F (0°C) 0.8 in
December 24°F (-4°C) 0.7 in

Boyd has a seasonal temperature swing of 45°F / from 23°F in January to 68°F in August. Total annual precipitation is 15.6 inches, with May being the wettest month (2.8") and February the driest (0.6").

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