Weather & Climate in Hysham, MT

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

Hysham experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 24°F in January while summers reach 73°F in July. The area gets 273 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 14.9 inches (drier than the 38-inch national average). The area receives 37.1 inches of snow annually, a moderate snowfall amount. 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 2,666 feet.

Temperature

24°F Jan (-5°C) 73°F Jul (23°C)

Annual Average	47.2°F
	13% below US avg
January Average	24°F (-5°C)
July Average	73°F (23°C)
Sunny Days	273 days/yr

Geography

Elevation	2,666 ft (813 m)
Area	0.2 sq mi (0.5 km²)
Population Density	1,364/sq mi
Coordinates	46.2909°N, 107.2305°W
Timezone	America/Denver
County	Treasure County County
Nearest Airport	Billings Logan International (BIL) 71 miles away

Precipitation & Snow

Annual Rainfall 14.9"

61% below US avg

Snowfall 37.1"

Wettest Month (May) 2.44"

Driest Month (Feb) 0.35"

Air Quality

AQI Median	26.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	0.5 / 100
Social Vulnerability	10.6 / 100
Community Resilience	4.7 / 100

Hazard Breakdown

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

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

Earthquake History

8 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	142 km	14 km
Jul 6, 2021	27 km SSE of Melstone, Montana	M3.6	41 km	10 km
Dec 23, 1991	10 km SW of Colstrip, Montana	M3.6	66 km	5 km
May 21, 2013	32 km NE of Melstone, Montana	M2.8	58 km	7 km
Jan 15, 2023	6 km NE of Ashland, Montana	M2.8	108 km	11 km
May 19, 2017	6 km ESE of Birney, Montana	M2.7	127 km	3 km
Jun 2, 2019	14 km WSW of Birney, Montana	M2.6	120 km	5 km
Apr 22, 2018	8 km ENE of Ashland, Montana	M2.6	112 km	5 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
May 4, 1986	EF2	66 km	0.1 mi	0
Jun 7, 2018	EF1	89 km	0.8 mi	0
May 21, 2016	EF1	63 km	2.0 mi	0
Jun 22, 1996	EF1	67 km	4.0 mi	0
Jul 9, 1991	EF1	69 km	0.1 mi	0
Jun 21, 1991	EF1	60 km	0.2 mi	0
May 24, 1990	EF1	98 km	0.2 mi	0
Jun 14, 1980	EF1	43 km	0.1 mi	0
Jul 6, 1955	EF1	94 km	2.0 mi	0
Jul 6, 1955	EF1	7 km	2.0 mi	0
May 31, 2014	EF0	61 km	0.1 mi	0
Jul 8, 2013	EF0	61 km	0.5 mi	0
Aug 26, 2004	EF0	100 km	—	0
Jun 22, 2002	EF0	93 km	0.1 mi	0
Aug 15, 1999	EF0	27 km	0.1 mi	0
Aug 15, 1999	EF0	48 km	0.1 mi	0
Aug 23, 1998	EF0	31 km	7.0 mi	0
Aug 23, 1998	EF0	34 km	7.0 mi	0
Jul 24, 1993	EF0	96 km	0.1 mi	0
Jul 20, 1993	EF0	91 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: RICHARD SPRING (168,765 acres, 2021).

Year	Name	Acres Burned	Distance
2021	RICHARD SPRING	168,765	84 km
1984	HAWK CREEK	157,778	80 km
2012	CHALKY	132,680	69 km
2008	DUNN MTN. ASSIST	105,494	74 km
2006	PINE RIDGE COMPLEX	103,074	46 km
2006	BUNDY RAILROAD	91,575	57 km
2012	SARPY HILLS COMPLEX	83,942	72 km
2021	P F	66,375	56 km
1994	BABY DEAN	61,955	93 km
2020	SARPY	51,619	73 km
2012	DELPHIA	40,396	71 km
2020	SNIDER	33,246	99 km
2020	BOBCAT	31,020	88 km
1999	FISHEL CREEK	28,611	70 km
2003	LITTLEHAWK	27,926	76 km
1996	ROSEBUD CREEK	25,174	82 km
2006	HORTON	25,108	84 km
2021	MUSSELSHELL TRAIL RD	22,723	38 km
1988	EARLYBIRD	21,730	89 km
2011	BLACK SPRINGS COMPLEX	19,473	78 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	24°F (-5°C)	0.5 in	Coldest
February	27°F (-3°C)	0.4 in	Driest
March	35°F (2°C)	0.6 in
April	46°F (8°C)	1.3 in
May	55°F (13°C)	2.4 in	Wettest
June	64°F (18°C)	2.2 in
July	73°F (23°C)	1.2 in	Warmest
August	70°F (21°C)	1.1 in
September	59°F (15°C)	1.4 in
October	48°F (9°C)	0.9 in
November	34°F (1°C)	0.5 in
December	24°F (-4°C)	0.6 in

Hysham has a seasonal temperature swing of 49°F / from 24°F in January to 73°F in July. Total annual precipitation is 13.1 inches, with May being the wettest month (2.4") and February the driest (0.4").

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