Weather & Climate in Fromberg, MT

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

Fromberg experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 24°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 11.5 inches (drier than the 38-inch national average). The area receives 30.3 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 3,527 feet.

Temperature

24°F Jan (-4°C) 70°F Jul (21°C)

Annual Average	45.7°F
	15% below US avg
January Average	24°F (-4°C)
July Average	70°F (21°C)
Sunny Days	311 days/yr

Geography

Elevation	3,527 ft (1,075 m)
Area	0.4 sq mi (1.1 km²)
Population Density	1,027/sq mi
Coordinates	45.3935°N, 108.9014°W
Timezone	America/Denver
County	Yellowstone County County
Nearest Airport	Billings Logan International (BIL) 33 miles away

Precipitation & Snow

Annual Rainfall 11.5"

70% below US avg

Snowfall 30.3"

Wettest Month (May) 2.60"

Driest Month (Feb) 0.55"

Air Quality

AQI Median	26.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	83.6 / 100
Social Vulnerability	20.3 / 100
Community Resilience	82.3 / 100

Hazard Breakdown

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

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

Earthquake History

102 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.

May 11, 2022	36 km S of Silver Gate, Montana	M4.2	117 km	14 km
Mar 25, 2008	35 km S of Silver Gate, Montana	M4.2	117 km	4 km
Jan 30, 2023	9 km NNW of Livingston, Montana	M3.8	138 km	20 km
Mar 29, 2023	56 km SSE of Mammoth, Wyoming	M3.7	150 km	4 km
Sep 24, 1994	39 km SSE of Mammoth, Wyoming	M3.7	148 km	5 km
Jan 9, 2003	23 km E of Wilsall, Montana	M3.7	133 km	11 km
Jul 6, 2021	27 km SSE of Melstone, Montana	M3.6	140 km	10 km
Jul 20, 1992	52 km SSE of Mammoth, Wyoming	M3.6	146 km	0 km
Jul 20, 1992	51 km SSE of Mammoth, Wyoming	M3.5	147 km	2 km
Jan 2, 2009	54 km SSE of Mammoth, Wyoming	M3.5	148 km	7 km
Jan 12, 2014	23 km SE of Mammoth, Wyoming	M3.4	143 km	9 km
Mar 4, 2019	35 km SSW of Silver Gate, Montana	M3.3	121 km	6 km
Mar 19, 1993	40 km SSE of Mammoth, Wyoming	M3.3	148 km	2 km
Jan 9, 2009	42 km SSW of Silver Gate, Montana	M3.3	133 km	7 km
Aug 16, 1992	47 km S of Silver Gate, Montana	M3.2	125 km	5 km
Jul 21, 2023	Eastern Montana	M3.2	13 km	5 km
Jul 3, 1994	25 km ESE of Mammoth, Wyoming	M3.2	131 km	11 km
Nov 9, 2009	40 km SW of Silver Gate, Montana	M3.1	132 km	6 km
Jan 2, 2009	52 km SSE of Mammoth, Wyoming	M3.1	148 km	3 km
Jan 1, 2009	54 km SSE of Mammoth, Wyoming	M3.1	148 km	4 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: EF3. Total: 3 injuries.

Date	Rating	Distance	Path	Fatalities
Aug 2, 1985	EF3	98 km	0.2 mi	0
Jun 16, 1965	EF3	55 km	20.6 mi	0
Jun 20, 2010	EF2	57 km	0.7 mi	0
Jun 16, 2010	EF2	29 km	1.0 mi	0
Jul 11, 1978	EF2	81 km	0.4 mi	0
Jun 26, 1964	EF2	73 km	1.0 mi	0
Jul 2, 1958	EF2	56 km	0.5 mi	0
Jun 21, 1991	EF1	52 km	0.2 mi	0
May 18, 1991	EF1	72 km	0.2 mi	0
May 24, 1990	EF1	73 km	0.2 mi	0
May 24, 1990	EF1	36 km	0.2 mi	0
Aug 25, 1986	EF1	97 km	1.0 mi	0
Jul 24, 1981	EF1	75 km	0.1 mi	0
Jun 18, 1978	EF1	81 km	0.1 mi	0
Jun 26, 1976	EF1	71 km	2.0 mi	0
Aug 22, 1965	EF1	97 km	1.5 mi	0
Aug 12, 1958	EF1	35 km	0.5 mi	0
Jul 6, 1955	EF1	72 km	2.0 mi	0
May 16, 2015	EF0	100 km	1.4 mi	0
May 24, 2014	EF0	64 km	0.8 mi	0

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

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).

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	74 km
1988	STORM CREEK	116,027	91 km
2003	HOBBLE	38,365	77 km
2021	ROBERTSON DRAW	31,132	43 km
1996	SHEPARD MTN	17,379	58 km
1994	BLACK BUTTE	10,231	87 km
2008	CASCADE	10,017	51 km
2010	STUMP GULCH	8,873	48 km
1996	COLFAX	8,429	90 km
2021	TROUT CREEK	7,804	61 km
2011	HOLE IN THE WALL	6,559	55 km
2006	BIRTHDAY2	6,553	80 km
2017	MICROWAVE	5,958	88 km
2003	DEEP LAKE	5,466	65 km
1996	LASTSTAND	5,385	95 km
2002	COW CREEK	5,162	23 km
2002	RED WAFFLE	5,060	49 km
2005	BIG HORN	4,899	68 km
1991	ROBERTSON	4,812	49 km
2000	PEASE	4,361	62 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	24°F (-4°C)	0.8 in	Coldest
February	29°F (-1°C)	0.6 in	Driest
March	37°F (3°C)	1.0 in
April	46°F (8°C)	1.7 in
May	55°F (13°C)	2.6 in	Wettest
June	64°F (18°C)	2.0 in
July	70°F (21°C)	0.9 in	Warmest
August	69°F (21°C)	1.0 in
September	59°F (15°C)	1.5 in
October	48°F (9°C)	1.2 in
November	34°F (1°C)	0.7 in
December	25°F (-4°C)	0.6 in

Fromberg has a seasonal temperature swing of 46°F / from 24°F in January to 70°F in July. Total annual precipitation is 14.3 inches, with May being the wettest month (2.6") and February the driest (0.6").

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