St. Marie, MT

Full City Profile · Montana · Valley County County

2.3 /5.0
C Fair
319 Population 14/sq mi density
$38,125 Median Income $16,802 per capita
43°F Avg Temperature
C
Overall
2.3 / 5.0
Fair overall score based on economy, affordability, safety and education
D
Economy
1.8 / 5.0
$38,125 median income, 17.4% unemployment
C+
Education
2.7 / 5.0
21.8% bachelor's degree or higher
St. Marie has a cool climate with an average annual temperature of 43°F (6°C). Winters average 15°F in January while summers reach 71°F in July. Annual precipitation totals 11.8 inches. The area receives 40.7 inches of snow annually.

Temperature

15°F Jan (-9°C) 71°F Jul (21°C)
Annual Average43.0°F
20% below US avg
January Average15°F (-9°C)
July Average71°F (21°C)

Geography

Elevation2,728 ft (831 m)
Area22.9 sq mi (59.3 km²)
Population Density14/sq mi
Coordinates48.4053°N, 106.4986°W
TimezoneAmerica/Denver
CountyValley County County
Nearest AirportSidney-Richland Regional (SDY)
117 miles away

Precipitation & Snow

Annual Rainfall 11.8"
69% below US avg
Snowfall 40.7"
Wettest Month (Jun) 3.08"
Driest Month (Dec) 0.16"

Air Quality

Natural Hazard Risk

Overall RiskVery Low
Risk Score35.9 / 100
Social Vulnerability40.2 / 100
Community Resilience45.3 / 100

Hazard Breakdown

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

Earthquake History

4 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.8. Most recent: M2.7 on Jul 10, 2021.

Feb 25, 2014 23 km N of Brockton, Montana M3.8 120 km
Jul 29, 1998 16 km WNW of Froid, Montana M3.8 132 km
Jul 10, 2021 24 km SSE of Malta, Montana M2.7 100 km
Jul 15, 2015 48 km E of Zortman, Montana M2.5 118 km
Source: USGS (M2.5+, 1990-2025)

Tornado History

69 tornadoes (EF0+) within 100 km since 1950. Strongest: EF2. Total: 1 fatality, 1 injury.

Date Rating Distance Fatalities
Jul 18, 2022 EF2 53 km 0
Jul 15, 2013 EF2 66 km 0
Jun 25, 1975 EF2 23 km 0
Jun 25, 1975 EF2 38 km 0
Jun 11, 1972 EF2 31 km 0
Aug 4, 1962 EF2 33 km 0
Jun 29, 2011 EF1 63 km 0
Jun 16, 2010 EF1 55 km 0
Aug 10, 2007 EF1 42 km 0
Aug 10, 2007 EF1 89 km 0
Jun 21, 1999 EF1 50 km 0
Jul 4, 1998 EF1 77 km 0
Jul 4, 1998 EF1 97 km 0
Jul 4, 1991 EF1 78 km 0
Jul 10, 1983 EF1 34 km 0
Jul 9, 1983 EF1 94 km 1
May 25, 1980 EF1 74 km 0
Jun 11, 1972 EF1 64 km 0
Jun 11, 1972 EF1 59 km 0
Aug 6, 1970 EF1 48 km 0
Source: NOAA SPC (EF0+, 1950-2024)

Wildfire History

20 wildfires (100+ acres) within 100 km. Largest: FLAT TIRE (COMPLEX) (17,467 ac, 2006).

Year Name Acres Distance
2006 FLAT TIRE (COMPLEX) 17,467 85 km
2006 BLACK PULASKI (BLACK PULASKI COMPLEX) 15,504 85 km
2012 HIGHWAY 13-20 8,372 86 km
2018 BUFFALO PASTURE 7,624 91 km
2003 GREYBULL 7,229 79 km
2017 LOWER BLACK COULEE 6,803 92 km
2006 LARB CREEK 6,778 78 km
1988 LANGEN 6,585 27 km
2007 BLACK COULEE 5,613 97 km
2006 BUFFALO RANCH 5,206 87 km
1995 GRANT COUL 3,690 76 km
2020 BULL 3,428 65 km
2022 BLISTER 3,298 76 km
2020 HILL 3,175 71 km
2001 CASTLE 3,021 94 km
1999 HALLOWEEN 2,845 82 km
2021 BADGER HOLE 2,804 60 km
2020 SAGE 2,554 48 km
2008 EAST UNIT CHARLIE 1,911 83 km
2017 TRIPLE CROSSING 1,804 91 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 15°F (-9°C) 0.3 in Coldest
February 18°F (-8°C) 0.2 in
March 31°F (-1°C) 0.2 in
April 44°F (6°C) 0.8 in
May 54°F (12°C) 1.9 in
June 63°F (17°C) 3.1 in Wettest
July 71°F (21°C) 1.6 in Warmest
August 70°F (21°C) 1.3 in
September 59°F (15°C) 1.0 in
October 45°F (7°C) 1.0 in
November 30°F (-1°C) 0.3 in
December 18°F (-8°C) 0.2 in Driest

St. Marie has a seasonal temperature swing of 56°F / from 15°F in January to 71°F in July. Total annual precipitation is 11.8 inches, with June being the wettest month (3.1") and December the driest (0.2").

View full weather details →