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Weather & Climate in Ulm, MT

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

Ulm has a cool climate with an average annual temperature of 44°F (6°C). Winters average 25°F in January while summers reach 66°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 13.3 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 3,336 feet.

Temperature

25°F Jan (-4°C) 66°F Jul (19°C)
Annual Average43.6°F
19% below US avg
January Average25°F (-4°C)
July Average66°F (19°C)
Sunny Days273 days/yr

Geography

Elevation3,336 ft (1,017 m)
Area20.3 sq mi (52.5 km²)
Population Density43/sq mi
Coordinates47.4214°N, 111.5233°W
TimezoneAmerica/Denver
CountyCascade County County
Nearest AirportGreat Falls International (GTF)
8 miles away

Precipitation & Snow

Annual Rainfall 13.3"
65% below US avg
Wettest Month (May) 2.48"
Driest Month (Feb) 0.39"

Air Quality

AQI Median26.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score83.1 / 100
Social Vulnerability27.1 / 100
Community Resilience76.3 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Relatively Low
Wildfire Relatively Low
Flood Relatively Moderate
Hail Relatively Low
Strong Wind Relatively Moderate
Heat Wave Relatively Low
Winter Weather Very High
Lightning Relatively Moderate
Ice Storm Very Low
Drought Relatively Low
Cold Wave Relatively High
Landslide Relatively Low
Avalanche Relatively Moderate
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

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

Jul 6, 2017 11 km SE of Lincoln, Montana M5.8 100 km 12 km
Jul 6, 2017 15 km S of Lincoln, Montana M5.0 110 km 15 km
Jul 6, 2017 14 km SE of Lincoln, Montana M4.4 100 km 10 km
Jan 30, 2016 19 km E of Lincoln, Montana M4.3 86 km 2 km
Apr 8, 2000 8 km ENE of Townsend, Montana M4.1 120 km 5 km
Jul 19, 2002 43 km NE of Seeley Lake, Montana M4.0 115 km 25 km
Jul 17, 2017 12 km ESE of Lincoln, Montana M4.0 97 km 13 km
Jul 6, 2017 14 km SSE of Lincoln, Montana M4.0 104 km 9 km
Nov 10, 2000 14 km NE of Townsend, Montana M4.0 114 km 2 km
Jun 2, 1996 37 km N of Ovando, Montana M3.9 115 km 5 km
Apr 1, 1993 15 km E of Lincoln, Montana M3.9 88 km 5 km
Aug 16, 1994 27 km W of Chester, Montana M3.9 120 km 5 km
Oct 19, 2017 12 km SE of Lincoln, Montana M3.9 98 km 4 km
Feb 6, 1999 24 km E of Townsend, Montana M3.9 121 km 1 km
Mar 13, 2017 4 km ESE of Avon, Montana M3.8 122 km 20 km
Mar 21, 1992 20 km NE of Seeley Lake, Montana M3.8 132 km 5 km
Apr 17, 2018 13 km ESE of Lincoln, Montana M3.8 96 km 14 km
Jul 5, 2024 24 km ENE of Seeley Lake, Montana M3.8 128 km 22 km
May 7, 1992 14 km NE of Seeley Lake, Montana M3.8 138 km 5 km
Jun 1, 1996 23 km N of Ovando, Montana M3.8 126 km 10 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

38 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 5 injuries.

Date Rating Distance Path Fatalities
Apr 24, 1994 EF2 100 km 1.5 mi 0
Apr 24, 1994 EF2 100 km 1.0 mi 0
Jun 30, 1975 EF2 45 km 0.1 mi 0
Jul 2, 1966 EF2 59 km 0.8 mi 0
Jun 16, 2007 EF1 88 km 5.3 mi 0
Jul 3, 1998 EF1 17 km 0.5 mi 0
Jun 19, 1998 EF1 73 km 1.0 mi 0
Jul 5, 1988 EF1 2 km 0.2 mi 0
Jun 1, 1980 EF1 59 km 0.1 mi 0
Jul 3, 1978 EF1 10 km 1.0 mi 0
Jul 3, 1978 EF1 10 km 1.0 mi 0
Jul 3, 1978 EF1 10 km 1.0 mi 0
Jun 1, 1977 EF1 24 km 0.1 mi 0
Jul 10, 1965 EF1 69 km 0.2 mi 0
Jul 2, 1964 EF1 41 km 27.0 mi 0
Jun 22, 1962 EF1 35 km 0.1 mi 0
Jun 29, 1961 EF1 32 km 0.1 mi 0
Jun 29, 1960 EF1 55 km 0.3 mi 0
Jun 23, 2018 EF0 59 km 1.4 mi 0
Aug 5, 2002 EF0 79 km 5.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: CANYON CREEK (167,875 acres, 1988).

Year Name Acres Burned Distance
1988 CANYON CREEK 167,875 95 km
2003 LINCOLN COMPLEX (SNOWBANK) 36,987 91 km
2021 HARRIS MTN 31,792 36 km
2017 ALICE CREEK 29,971 76 km
1984 NORTH HILL 27,162 74 km
2000 CANYON FERRY COMPLEX (CAVE GULCH) 26,997 80 km
2007 MERIWETHER 18,865 65 km
2000 CANYON FERRY COMPLEX (BUCKSNORT) 14,843 95 km
1990 BEARTOOTH COMPLEX 13,462 55 km
2009 MEISSNER 12,318 95 km
1993 FREEZEOUT LAKE 9,793 55 km
2021 BALSINGER 8,317 67 km
2009 INDIAN TRAIL 4,592 58 km
2020 YOGO 4,429 95 km
2019 NORTH HILLS 4,149 80 km
2019 STUCKEY RD MA 4,073 22 km
1991 POWER 3,822 37 km
2002 PISHKUN 3,450 71 km
2012 MISSION ROAD 3,372 40 km
2008 UNIT 3 MARSH HAZ FUEL REDUCTION 3,333 31 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 25°F (-4°C) 0.6 in Coldest
February 28°F (-2°C) 0.4 in Driest
March 35°F (2°C) 0.9 in
April 45°F (7°C) 1.3 in
May 54°F (12°C) 2.5 in Wettest
June 62°F (17°C) 2.2 in
July 66°F (19°C) 1.5 in
August 68°F (20°C) 1.5 in Warmest
September 57°F (14°C) 1.3 in
October 47°F (9°C) 0.9 in
November 34°F (1°C) 0.6 in
December 26°F (-4°C) 0.6 in

Ulm has a seasonal temperature swing of 43°F / from 25°F in January to 68°F in August. Total annual precipitation is 14.1 inches, with May being the wettest month (2.5") and February the driest (0.4").

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