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Weather & Climate in Marysville, MT

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

Marysville has a cool climate with an average annual temperature of 40°F (5°C). Winters average 21°F in January while summers reach 64°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 16.5 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 5,427 feet.

Temperature

21°F Jan (-6°C) 64°F Jul (18°C)
Annual Average40.3°F
25% below US avg
January Average21°F (-6°C)
July Average64°F (18°C)
Sunny Days273 days/yr

Geography

Elevation5,427 ft (1,654 m)
Area0.5 sq mi (1.3 km²)
Population Density194/sq mi
Coordinates46.7502°N, 112.3027°W
TimezoneAmerica/Denver
CountyPowell County County
Nearest AirportHelena Regional (HLN)
18 miles away

Precipitation & Snow

Annual Rainfall 16.5"
57% below US avg
Wettest Month (May) 2.13"
Driest Month (Feb) 0.63"

Air Quality

AQI Median26.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score10.0 / 100
Social Vulnerability58.1 / 100
Community Resilience19.4 / 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 Moderate
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

447 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 25 km 12 km
Jul 6, 2017 15 km S of Lincoln, Montana M5.0 28 km 15 km
Jul 6, 2017 14 km SE of Lincoln, Montana M4.4 22 km 10 km
Jan 30, 2016 19 km E of Lincoln, Montana M4.3 24 km 2 km
Oct 28, 1998 18 km S of Whitehall, Montana M4.3 117 km 5 km
Aug 16, 2019 4 km NW of Manhattan, Montana M4.2 120 km 2 km
Jun 18, 2006 6 km S of Pony, Montana M4.1 131 km 12 km
Aug 6, 2019 3 km NW of Manhattan, Montana M4.1 121 km 5 km
Apr 8, 2000 8 km ENE of Townsend, Montana M4.1 82 km 5 km
Sep 3, 2016 16 km S of Whitehall, Montana M4.0 115 km 8 km
Nov 10, 2000 14 km NE of Townsend, Montana M4.0 81 km 2 km
Jun 28, 2000 21 km SE of Clinton, Montana M4.0 95 km 10 km
Jul 19, 2002 43 km NE of Seeley Lake, Montana M4.0 94 km 25 km
Jul 14, 2019 11 km NNE of Manhattan, Montana M4.0 119 km 6 km
Jul 6, 2017 14 km SSE of Lincoln, Montana M4.0 24 km 9 km
Mar 6, 2009 18 km S of Whitehall, Montana M4.0 117 km 12 km
Jul 17, 2017 12 km ESE of Lincoln, Montana M4.0 24 km 13 km
Nov 6, 1997 4 km WSW of Springhill, Montana M4.0 140 km 5 km
Oct 19, 2017 12 km SE of Lincoln, Montana M3.9 24 km 4 km
Apr 1, 1993 15 km E of Lincoln, Montana M3.9 26 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

22 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.

Date Rating Distance Path Fatalities
Jun 30, 1975 EF2 83 km 0.1 mi 0
Jul 2, 1966 EF2 83 km 0.8 mi 0
Jul 5, 1988 EF1 94 km 0.2 mi 0
Jun 28, 1982 EF1 48 km 0.5 mi 0
Jul 3, 1978 EF1 89 km 1.0 mi 0
Jul 3, 1978 EF1 89 km 1.0 mi 0
Jul 3, 1978 EF1 89 km 1.0 mi 0
Jun 1, 1977 EF1 91 km 0.1 mi 0
Jul 2, 1964 EF1 97 km 27.0 mi 0
Jun 22, 1962 EF1 99 km 0.1 mi 0
Sep 15, 1997 EF0 83 km 0.1 mi 0
Jun 27, 1997 EF0 28 km 0.1 mi 0
Jun 15, 1996 EF0 98 km 2.0 mi 0
Jun 21, 1993 EF0 28 km 0.1 mi 0
Jun 11, 1993 EF0 30 km 0.1 mi 0
Jul 9, 1992 EF0 10 km 0.1 mi 0
Jun 12, 1992 EF0 74 km 0.1 mi 0
Aug 11, 1988 EF0 78 km 2.0 mi 0
May 4, 1971 EF0 52 km 0.5 mi 0
May 17, 1962 EF0 60 km 0.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: RICE RIDGE (171,473 acres, 2017).

Year Name Acres Burned Distance
2017 RICE RIDGE 171,473 90 km
1988 CANYON CREEK 167,875 64 km
2021 WOODS CREEK 55,836 82 km
2003 LINCOLN COMPLEX (SNOWBANK) 36,987 45 km
1988 CANYON CREEK 35,865 52 km
2021 HARRIS MTN 31,792 62 km
2017 ALICE CREEK 29,971 45 km
2012 ELBOW PASS COMPLEX 28,989 83 km
1984 NORTH HILL 27,162 32 km
2000 CANYON FERRY COMPLEX (CAVE GULCH) 26,997 52 km
2021 HAYSTACK 26,118 66 km
2007 CONGER CREEK 22,936 74 km
2000 MONTURE-SPREAD RIDGE (MONTURE) 22,493 91 km
2007 MERIWETHER 18,865 38 km
2017 PARK CREEK 17,915 47 km
2007 RAILLEY MOUNTAIN 17,528 97 km
2000 RYAN GULCH 16,440 89 km
2000 CANYON FERRY COMPLEX (BUCKSNORT) 14,843 49 km
1990 BEARTOOTH COMPLEX 13,462 45 km
2000 BOULDER COMPLEX (HIGH ORE ROAD) 9,625 51 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 21°F (-6°C) 0.9 in Coldest
February 26°F (-3°C) 0.6 in Driest
March 32°F (0°C) 0.8 in
April 40°F (4°C) 1.1 in
May 49°F (9°C) 2.1 in Wettest
June 57°F (14°C) 2.1 in
July 64°F (18°C) 1.3 in Warmest
August 63°F (17°C) 1.5 in
September 53°F (12°C) 1.3 in
October 43°F (6°C) 0.8 in
November 30°F (-1°C) 0.7 in
December 22°F (-5°C) 0.9 in

Marysville has a seasonal temperature swing of 43°F / from 21°F in January to 64°F in July. Total annual precipitation is 14.1 inches, with May being the wettest month (2.1") and February the driest (0.6").

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