Weather & Climate in Corwin Springs, MT

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

Corwin Springs experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 26°F in January while summers reach 70°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 13.9 inches (drier than the 38-inch national average). 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 5,391 feet.

Temperature

26°F Jan (-3°C) 70°F Jul (21°C)

Annual Average	46.3°F
	14% below US avg
January Average	26°F (-3°C)
July Average	70°F (21°C)
Sunny Days	311 days/yr

Geography

Elevation	5,391 ft (1,643 m)
Area	1.5 sq mi (3.9 km²)
Population Density	126/sq mi
Coordinates	45.1323°N, 110.7992°W
Timezone	America/Denver
County	Park County County
Nearest Airport	Bozeman Yellowstone International (BZN) 48 miles away

Precipitation & Snow

Annual Rainfall 13.9"

63% below US avg

Wettest Month (May) 2.60"

Driest Month (Oct) 1.46"

Air Quality

AQI Median	26.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	66.3 / 100
Social Vulnerability	29.1 / 100
Community Resilience	82.1 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Relatively 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	Very Low
Cold Wave	Relatively Moderate
Landslide	Relatively Moderate
Volcano	Very Low
Avalanche	Very High

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

Earthquake History

1,053 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.

Jul 26, 2005	16 km N of Dillon, Montana	M5.6	145 km	13 km
Mar 30, 2014	22 km S of Mammoth, Wyoming	M4.8	41 km	6 km
Apr 9, 2019	9 km NE of Lima, Montana	M4.6	143 km	14 km
Apr 5, 2011	28 km NNE of Spencer, Idaho	M4.4	117 km	12 km
Feb 5, 2006	44 km NE of Spencer, Idaho	M4.4	98 km	14 km
May 8, 2007	8 km NNW of Alder, Montana	M4.4	108 km	14 km
Jun 16, 2017	12 km E of Hebgen Lake Estates, Montana	M4.4	43 km	9 km
Jun 13, 2016	45 km W of Hebgen Lake Estates, Montana	M4.3	88 km	10 km
Aug 21, 2003	53 km N of Kelly, Wyoming	M4.3	118 km	6 km
Oct 28, 1998	18 km S of Whitehall, Montana	M4.3	122 km	5 km
May 11, 2022	36 km S of Silver Gate, Montana	M4.2	81 km	14 km
Nov 24, 2000	24 km S of Mammoth, Wyoming	M4.2	43 km	9 km
Aug 23, 1998	9 km N of Alta, Wyoming	M4.2	145 km	5 km
Aug 16, 2019	4 km NW of Manhattan, Montana	M4.2	95 km	2 km
Mar 25, 2008	35 km S of Silver Gate, Montana	M4.2	79 km	4 km
Aug 28, 1995	62 km NNE of Kelly, Wyoming	M4.2	117 km	8 km
Oct 7, 2024	11 km E of Dillon, Montana	M4.1	133 km	17 km
Aug 6, 2019	3 km NW of Manhattan, Montana	M4.1	94 km	5 km
Jun 18, 2006	6 km S of Pony, Montana	M4.1	101 km	12 km
Aug 30, 1997	25 km WNW of Hebgen Lake Estates, Montana	M4.1	64 km	4 km

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

Tornado History

7 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1.

Date	Rating	Distance	Path	Fatalities
Aug 22, 1965	EF1	97 km	1.5 mi	0
Jun 15, 1960	EF1	67 km	1.3 mi	0
Jun 29, 1999	EF0	68 km	0.2 mi	0
Jul 2, 1997	EF0	93 km	0.1 mi	0
Jul 2, 1997	EF0	93 km	0.1 mi	0
Jul 6, 1993	EF0	94 km	0.1 mi	0
Jun 29, 1992	EF0	86 km	0.1 mi	0

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

Nearby Volcanoes

1 volcano within 200 km. Closest: Yellowstone (79 km).

Name	Type	Elevation	Last Eruption	Distance
Yellowstone	Caldera(s)	2,805 m (9,203 ft)	-1350	79 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: NORTH FORK (563,527 acres, 1988).

Year	Name	Acres Burned	Distance
1988	NORTH FORK	563,527	51 km
1988	CLOVERMIST	303,427	82 km
2006	DERBY	200,993	93 km
1988	STORM CREEK	116,027	62 km
2016	MAPLE	103,193	47 km
1988	SNAKE	95,233	99 km
1988	HELLROARING	77,598	37 km
1988	CLOVER	34,035	76 km
1988	SHOSHONE	29,941	86 km
2001	FRIDLEY	27,575	39 km
1988	REDSHOSHONE COMPLEX	27,443	91 km
2006	JUNGLE	23,846	56 km
2007	WH COMPLEX (WICKED CREEK)	22,195	29 km
1988	RED	21,341	93 km
1988	FAN	20,422	21 km
1996	SHEPARD MTN	17,379	95 km
2007	COLUMBINE 1	17,290	95 km
2003	EAST	17,226	83 km
2012	BEAR TRAP 2	14,875	82 km
2016	BUFFALO	13,706	43 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	26°F (-3°C)	1.9 in
February	21°F (-6°C)	1.5 in
March	26°F (-3°C)	1.8 in
April	34°F (1°C)	1.6 in
May	43°F (6°C)	2.6 in	Wettest
June	52°F (11°C)	2.6 in
July	70°F (21°C)	1.8 in	Warmest
August	58°F (15°C)	1.7 in
September	50°F (10°C)	1.8 in
October	40°F (5°C)	1.5 in	Driest
November	27°F (-3°C)	1.8 in
December	18°F (-8°C)	1.9 in	Coldest

Corwin Springs has a seasonal temperature swing of 52°F / from 18°F in December to 70°F in July. Total annual precipitation is 22.3 inches, with May being the wettest month (2.6") and October the driest (1.5").

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