Weather & Climate in St. Xavier, MT

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

St. Xavier experiences four distinct seasons with an average annual temperature of 49°F (10°C). Winters average 29°F in January while summers reach 74°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 16.7 inches (drier than the 38-inch national average). The area receives 43.9 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 3,078 feet.

Temperature

29°F Jan (-2°C) 74°F Jul (23°C)

Annual Average	49.4°F
	9% below US avg
January Average	29°F (-2°C)
July Average	74°F (23°C)
Sunny Days	311 days/yr

Geography

Elevation	3,078 ft (938 m)
Area	5.6 sq mi (14.5 km²)
Population Density	14/sq mi
Coordinates	45.4570°N, 107.7250°W
Timezone	America/Denver
County	Big Horn County County
Nearest Airport	Billings Logan International (BIL) 46 miles away

Precipitation & Snow

Annual Rainfall 16.7"

56% below US avg

Snowfall 43.9"

Wettest Month (May) 2.95"

Driest Month (Feb) 0.71"

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	106 km	14 km
Feb 25, 1993	31 km N of Arvada, Wyoming	M3.9	143 km	5 km
Jul 6, 2021	27 km SSE of Melstone, Montana	M3.6	101 km	10 km
Dec 23, 1991	10 km SW of Colstrip, Montana	M3.6	88 km	5 km
Jul 21, 2023	Eastern Montana	M3.2	88 km	5 km
Feb 13, 1998	12 km NE of Hyattville, Wyoming	M3.0	126 km	5 km
May 25, 2018	45 km W of Biddle, Montana	M2.9	147 km	16 km
Mar 23, 2023	8 km S of Shell, Wyoming	M2.8	111 km	11 km
May 21, 2013	32 km NE of Melstone, Montana	M2.8	147 km	7 km
Mar 30, 2018	20 km NNE of Sheridan, Wyoming	M2.8	89 km	5 km
Jan 15, 2023	6 km NE of Ashland, Montana	M2.8	120 km	11 km
Aug 7, 2022	38 km N of Arvada, Wyoming	M2.8	141 km	11 km
May 19, 2017	6 km ESE of Birney, Montana	M2.7	102 km	3 km
Jun 2, 2019	14 km WSW of Birney, Montana	M2.6	83 km	5 km
Mar 31, 2009	36 km NNE of Arvada, Wyoming	M2.6	147 km	17 km
Apr 22, 2018	8 km ENE of Ashland, Montana	M2.6	123 km	5 km
Jan 6, 2016	27 km ENE of Lovell, Wyoming	M2.6	62 km	12 km

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

Tornado History

56 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 6 injuries.

Date	Rating	Distance	Path	Fatalities
Aug 2, 1985	EF3	72 km	0.2 mi	0
Jun 16, 1965	EF3	71 km	20.6 mi	0
Jun 20, 2010	EF2	71 km	0.7 mi	0
Jun 16, 2010	EF2	82 km	1.0 mi	0
Jul 2, 1958	EF2	70 km	0.5 mi	0
Jun 7, 2018	EF1	76 km	0.8 mi	0
May 21, 2016	EF1	90 km	2.0 mi	0
Jun 22, 1996	EF1	34 km	4.0 mi	0
Jul 9, 1991	EF1	32 km	0.1 mi	0
Jun 21, 1991	EF1	42 km	0.2 mi	0
Jun 21, 1991	EF1	77 km	0.2 mi	0
May 24, 1990	EF1	76 km	0.2 mi	0
May 24, 1990	EF1	87 km	0.2 mi	0
Jun 21, 1984	EF1	42 km	1.0 mi	0
Jun 21, 1984	EF1	89 km	2.0 mi	0
Jun 15, 1984	EF1	70 km	1.0 mi	0
Jul 24, 1981	EF1	87 km	0.1 mi	0
Jun 18, 1978	EF1	81 km	0.1 mi	0
Jul 20, 1974	EF1	92 km	0.1 mi	0
Jun 11, 1968	EF1	99 km	0.3 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	97 km
1984	HAWK CREEK	157,778	99 km
2012	CHALKY	132,680	80 km
2008	DUNN MTN. ASSIST	105,494	92 km
2006	PINE RIDGE COMPLEX	103,074	62 km
2006	BUNDY RAILROAD	91,575	78 km
2012	SARPY HILLS COMPLEX	83,942	42 km
2021	P F	66,375	45 km
1994	BABY DEAN	61,955	73 km
2020	SARPY	51,619	60 km
2017	WITTEN	27,938	88 km
2003	LITTLEHAWK	27,926	65 km
2021	MUSSELSHELL TRAIL RD	22,723	89 km
1988	EARLYBIRD	21,730	97 km
2011	BLACK SPRINGS COMPLEX	19,473	74 km
2024	MCGHEE	19,161	94 km
1988	KIRBY	14,253	78 km
2007	BONE CREEK	12,776	92 km
2022	BUSMAN ROAD	12,584	98 km
1996	ROLLOVER	10,743	36 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	29°F (-2°C)	0.9 in
February	28°F (-2°C)	0.7 in	Driest
March	37°F (3°C)	1.2 in
April	46°F (8°C)	2.2 in
May	56°F (13°C)	3.0 in	Wettest
June	65°F (18°C)	2.3 in
July	74°F (23°C)	1.1 in	Warmest
August	71°F (22°C)	1.1 in
September	61°F (16°C)	1.8 in
October	49°F (9°C)	1.5 in
November	35°F (2°C)	1.0 in
December	26°F (-3°C)	0.8 in	Coldest

St. Xavier has a seasonal temperature swing of 48°F / from 26°F in December to 74°F in July. Total annual precipitation is 17.6 inches, with May being the wettest month (3.0") and February the driest (0.7").

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