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Weather & Climate in White Sulphur Springs, MT

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

White Sulphur Springs has a cool climate with an average annual temperature of 42°F (6°C). Winters average 23°F in January while summers reach 65°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 13.0 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 5,058 feet.

Temperature

23°F Jan (-5°C) 65°F Jul (18°C)
Annual Average42.1°F
22% below US avg
January Average23°F (-5°C)
July Average65°F (18°C)
Sunny Days273 days/yr

Geography

Elevation5,058 ft (1,542 m)
Area1.0 sq mi (2.6 km²)
Population Density1,108/sq mi
Coordinates46.5453°N, 110.9039°W
TimezoneAmerica/Denver
CountyMeagher County County
Nearest AirportHelena Regional (HLN)
51 miles away

Precipitation & Snow

Annual Rainfall 13.0"
66% below US avg
Wettest Month (May) 2.48"
Driest Month (Feb) 0.47"

Air Quality

AQI Median26.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score2.8 / 100
Social Vulnerability51.2 / 100
Community Resilience15.5 / 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 Relatively Low
Lightning Very Low
Ice Storm Very Low
Drought Very Low
Cold Wave Relatively Low
Landslide Relatively Moderate
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

358 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.

Jul 6, 2017 11 km SE of Lincoln, Montana M5.8 133 km 12 km
Jul 6, 2017 15 km S of Lincoln, Montana M5.0 138 km 15 km
Jul 6, 2017 14 km SE of Lincoln, Montana M4.4 130 km 10 km
Jan 30, 2016 19 km E of Lincoln, Montana M4.3 124 km 2 km
Oct 28, 1998 18 km S of Whitehall, Montana M4.3 133 km 5 km
Aug 16, 2019 4 km NW of Manhattan, Montana M4.2 81 km 2 km
Jun 18, 2006 6 km S of Pony, Montana M4.1 130 km 12 km
Aug 6, 2019 3 km NW of Manhattan, Montana M4.1 82 km 5 km
Apr 8, 2000 8 km ENE of Townsend, Montana M4.1 45 km 5 km
Sep 3, 2016 16 km S of Whitehall, Montana M4.0 131 km 8 km
Jul 17, 2017 12 km ESE of Lincoln, Montana M4.0 131 km 13 km
Jul 6, 2017 14 km SSE of Lincoln, Montana M4.0 133 km 9 km
Nov 6, 1997 4 km WSW of Springhill, Montana M4.0 82 km 5 km
Nov 10, 2000 14 km NE of Townsend, Montana M4.0 39 km 2 km
Mar 6, 2009 18 km S of Whitehall, Montana M4.0 133 km 12 km
Jul 14, 2019 11 km NNE of Manhattan, Montana M4.0 72 km 6 km
Sep 24, 1995 15 km S of Pony, Montana M3.9 137 km 5 km
Jun 21, 2006 5 km SSW of Pony, Montana M3.9 130 km 11 km
Oct 19, 2017 12 km SE of Lincoln, Montana M3.9 131 km 4 km
Apr 1, 1993 15 km E of Lincoln, Montana M3.9 128 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Tornado History

46 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 1 injury.

Date Rating Distance Path Fatalities
Jul 2, 2010 EF2 54 km 2.1 mi 0
Apr 24, 1994 EF2 81 km 1.5 mi 0
Apr 24, 1994 EF2 81 km 1.0 mi 0
Jun 30, 1975 EF2 64 km 0.1 mi 0
Jul 10, 1965 EF2 48 km 2.0 mi 0
Jul 20, 1964 EF2 86 km 2.0 mi 0
Jun 5, 2012 EF1 4 km 2.8 mi 0
Jun 16, 2007 EF1 52 km 5.3 mi 0
Apr 22, 2003 EF1 85 km 2.0 mi 0
Jul 3, 1978 EF1 98 km 1.0 mi 0
Jul 3, 1978 EF1 98 km 1.0 mi 0
Jul 3, 1978 EF1 98 km 1.0 mi 0
May 10, 1977 EF1 90 km 0.1 mi 0
May 10, 1977 EF1 79 km 0.1 mi 0
Jun 3, 1971 EF1 78 km 2.3 mi 0
Jun 29, 1961 EF1 96 km 0.1 mi 0
Jun 15, 1960 EF1 95 km 1.3 mi 0
Jul 7, 1957 EF1 84 km 1.5 mi 0
Jul 6, 2022 EF0 78 km 1.3 mi 0
Jun 27, 2019 EF0 71 km 0.4 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: TOSTON-MAUDLOW (80,383 acres, 2000).

Year Name Acres Burned Distance
2000 TOSTON-MAUDLOW 80,383 46 km
2021 WOODS CREEK 55,836 28 km
1988 CANYON CREEK 35,865 69 km
2021 HARRIS MTN 31,792 86 km
1984 NORTH HILL 27,162 81 km
2000 CANYON FERRY COMPLEX (CAVE GULCH) 26,997 57 km
1990 TURKEY 25,658 70 km
2021 AMERICAN FORK 20,726 61 km
2007 MERIWETHER 18,865 81 km
2000 CANYON FERRY COMPLEX (BUCKSNORT) 14,843 62 km
1990 BEARTOOTH COMPLEX 13,462 83 km
1985 SANDPOINT 10,439 42 km
2000 BOULDER COMPLEX (HIGH ORE ROAD) 9,625 99 km
2015 EUSTIS 8,469 71 km
2021 BALSINGER 8,317 50 km
2020 BRIDGER FOOTHILLS 8,291 90 km
2015 COTTONWOOD GULCH 8,100 75 km
2017 CHINN MA 7,029 21 km
1988 TWO DOT 5,097 54 km
2009 INDIAN TRAIL 4,592 92 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 23°F (-5°C) 0.6 in
February 25°F (-4°C) 0.5 in Driest
March 31°F (-0°C) 0.9 in
April 40°F (4°C) 1.3 in
May 49°F (9°C) 2.5 in Wettest
June 57°F (14°C) 2.4 in
July 65°F (18°C) 1.5 in Warmest
August 63°F (17°C) 1.4 in
September 53°F (12°C) 1.4 in
October 43°F (6°C) 1.0 in
November 30°F (-1°C) 0.6 in
December 21°F (-6°C) 0.6 in Coldest

White Sulphur Springs has a seasonal temperature swing of 43°F / from 21°F in December to 65°F in July. Total annual precipitation is 14.7 inches, with May being the wettest month (2.5") and February the driest (0.5").

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