Weather & Climate in Muddy, MT

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

Muddy has a cool climate with an average annual temperature of 45°F (7°C). Winters average 21°F in January while summers reach 71°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 15.7 inches (drier than the 38-inch national average). The area receives 52.3 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 3,585 feet.

Temperature

21°F Jan (-6°C) 71°F Jul (21°C)

Annual Average	45.0°F
	17% below US avg
January Average	21°F (-6°C)
July Average	71°F (21°C)
Sunny Days	311 days/yr

Geography

Elevation	3,585 ft (1,093 m)
Area	28.6 sq mi (74.2 km²)
Population Density	22/sq mi
Coordinates	45.5798°N, 106.7754°W
Timezone	America/Denver
County	Big Horn County County
Nearest Airport	Sheridan County (SHR) 57 miles away

Precipitation & Snow

Annual Rainfall 15.7"

59% below US avg

Snowfall 52.3"

Wettest Month (May) 2.76"

Driest Month (Feb) 0.59"

Air Quality

AQI Median	26.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	57.2 / 100
Social Vulnerability	94.2 / 100
Community Resilience	4.8 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Very Low
Wildfire	Relatively Moderate
Flood	Relatively Low
Hail	Relatively Low
Strong Wind	Relatively High
Heat Wave	Very Low
Winter Weather	Relatively High
Lightning	Relatively High
Ice Storm	Very Low
Drought	Relatively Low
Cold Wave	Relatively Moderate
Landslide	Relatively Low
Volcano	Very Low
Avalanche	Very Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

17 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.

Aug 22, 2009	20 km SSE of Birney, Montana	M4.0	55 km	14 km
Feb 25, 1993	31 km N of Arvada, Wyoming	M3.9	91 km	5 km
Jul 6, 2021	27 km SSE of Melstone, Montana	M3.6	116 km	10 km
Dec 23, 1991	10 km SW of Colstrip, Montana	M3.6	27 km	5 km
Nov 3, 1999	8 km NNW of Broadus, Montana	M3.5	102 km	10 km
May 25, 2018	45 km W of Biddle, Montana	M2.9	87 km	16 km
Feb 22, 1992	30 km E of Buffalo, Wyoming	M2.9	144 km	5 km
Mar 23, 2023	8 km S of Shell, Wyoming	M2.8	147 km	11 km
Aug 7, 2022	38 km N of Arvada, Wyoming	M2.8	87 km	11 km
Jan 15, 2023	6 km NE of Ashland, Montana	M2.8	45 km	11 km
Mar 30, 2018	20 km NNE of Sheridan, Wyoming	M2.8	69 km	5 km
May 21, 2013	32 km NE of Melstone, Montana	M2.8	144 km	7 km
May 19, 2017	6 km ESE of Birney, Montana	M2.7	41 km	3 km
Apr 22, 2018	8 km ENE of Ashland, Montana	M2.6	48 km	5 km
Jun 2, 2019	14 km WSW of Birney, Montana	M2.6	34 km	5 km
Mar 31, 2009	36 km NNE of Arvada, Wyoming	M2.6	93 km	17 km
Jan 6, 2016	27 km ENE of Lovell, Wyoming	M2.6	124 km	12 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

41 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 injuries.

Date	Rating	Distance	Path	Fatalities
Jun 21, 2010	EF2	99 km	0.5 mi	0
Jun 7, 2018	EF1	3 km	0.8 mi	0
Jun 21, 2010	EF1	61 km	1.0 mi	0
Jun 22, 1996	EF1	67 km	4.0 mi	0
Jul 9, 1991	EF1	66 km	0.1 mi	0
Jun 21, 1991	EF1	69 km	0.2 mi	0
Jun 21, 1984	EF1	46 km	1.0 mi	0
Jun 21, 1984	EF1	65 km	2.0 mi	0
Jun 15, 1984	EF1	91 km	1.0 mi	0
Jun 13, 1984	EF1	78 km	1.0 mi	0
Jun 14, 1980	EF1	77 km	0.1 mi	0
Jun 11, 1968	EF1	93 km	0.3 mi	0
Jun 7, 1968	EF1	98 km	0.3 mi	0
Jul 6, 1955	EF1	82 km	2.0 mi	0
May 31, 2014	EF0	91 km	0.1 mi	0
Aug 3, 2013	EF0	93 km	1.0 mi	0
Jun 10, 2004	EF0	80 km	3.6 mi	0
Jul 5, 2000	EF0	89 km	0.5 mi	0
Jul 5, 2000	EF0	67 km	0.5 mi	0
Aug 15, 1999	EF0	77 km	0.1 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: ASH CREEK (253,413 acres, 2012).

Year	Name	Acres Burned	Distance
2012	ASH CREEK	253,413	50 km
2024	REMINGTON	192,577	61 km
2021	RICHARD SPRING	168,765	24 km
2012	CHALKY	132,680	19 km
2006	PINE RIDGE COMPLEX	103,074	85 km
2017	SARTIN DRAW	91,570	66 km
2017	DEER CREEK	90,147	73 km
2012	SARPY HILLS COMPLEX	83,942	38 km
2021	P F	66,375	58 km
2012	TAYLOR CREEK	64,383	68 km
2000	STAG	62,381	47 km
1994	BABY DEAN	61,955	8 km
2020	SARPY	51,619	20 km
2006	BUFFALO CREEK	37,630	88 km
2011	DIAMOND COMPLEX	33,546	76 km
2020	SNIDER	33,246	57 km
2017	WITTEN	27,938	29 km
2003	LITTLEHAWK	27,926	14 km
2020	WADDLE CREEK	25,809	78 km
1996	ROSEBUD CREEK	25,174	66 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	21°F (-6°C)	0.7 in	Coldest
February	26°F (-4°C)	0.6 in	Driest
March	34°F (1°C)	0.9 in
April	44°F (6°C)	1.5 in
May	53°F (12°C)	2.8 in	Wettest
June	62°F (17°C)	2.8 in
July	71°F (21°C)	1.1 in	Warmest
August	68°F (20°C)	1.1 in
September	58°F (14°C)	1.5 in
October	46°F (8°C)	1.2 in
November	33°F (0°C)	0.8 in
December	23°F (-5°C)	0.7 in

Muddy has a seasonal temperature swing of 49°F / from 21°F in January to 71°F in July. Total annual precipitation is 15.5 inches, with May being the wettest month (2.8") and February the driest (0.6").

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