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St. Marie CDP, Montana

Official LSAD Designation: St. Marie CDP • Census GEOID: 3065400 • Valley County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for St. Marie CDP.

Reference Weather Station: ST MARIE, MT US (ID: USW00094010) • Located 0.8 miles from community center • Elevation: 840.0 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 24.3° 5.7° 15.0° 0.25"
February 27.9° 8.7° 18.3° 0.20"
March 41.4° 19.7° 30.6° 0.23"
April 56.1° 30.8° 43.5° 0.82"
May 66.5° 41.1° 53.8° 1.94"
June 74.7° 50.7° 62.7° 3.08"
July 84.5° 56.8° 70.6° 1.57"
August 83.9° 55.7° 69.8° 1.32"
September 72.8° 45.9° 59.3° 0.99"
October 56.5° 33.0° 44.8° 0.95"
November 39.3° 20.3° 29.8° 0.26"
December 27.2° 9.4° 18.3° 0.16"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station ST MARIE, MT US (ID: USW00094010) • 0.8 miles from community center .

This is the same reference station used for monthly normals.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at ST MARIE, MT US Year is the horizontal axis. Annual mean temperature in degrees Fahrenheit is the vertical axis. Dots show recorded years; lines connect consecutive available years only. Missing years are gaps, with no interpolation. Optional dashed lines show annual mean of daily highs and lows. Exact values appear in the data table below. 26.0 34.8 43.5 52.3 61.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2011: Annual mean 40.6°F 2012: Annual mean 45.0°F 2014: Annual mean 41.5°F 2015: Annual mean 45.6°F 2017: Annual mean 44.2°F 2018: Annual mean 40.7°F 2019: Annual mean 39.6°F 2023: Annual mean 44.6°F 2024: Annual mean 45.1°F 2025: Annual mean 44.1°F 2011: Annual mean of daily highs 51.7°F 2012: Annual mean of daily highs 57.4°F 2014: Annual mean of daily highs 52.9°F 2015: Annual mean of daily highs 58.0°F 2017: Annual mean of daily highs 55.9°F 2018: Annual mean of daily highs 51.4°F 2019: Annual mean of daily highs 50.2°F 2021: Annual mean of daily highs 57.9°F 2023: Annual mean of daily highs 55.8°F 2024: Annual mean of daily highs 56.5°F 2025: Annual mean of daily highs 55.9°F 2011: Annual mean of daily lows 29.6°F 2012: Annual mean of daily lows 32.6°F 2014: Annual mean of daily lows 30.0°F 2015: Annual mean of daily lows 33.3°F 2017: Annual mean of daily lows 32.6°F 2018: Annual mean of daily lows 30.0°F 2019: Annual mean of daily lows 28.9°F 2023: Annual mean of daily lows 33.4°F 2024: Annual mean of daily lows 33.7°F 2025: Annual mean of daily lows 32.3°F

Source: NOAA NCEI Global Summary of the Year.

Annual temperature data table (°F)
Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year Annual mean (°F) Annual mean of daily highs (°F) Annual mean of daily lows (°F)
2010 Unavailable Unavailable Unavailable
2011 40.6 51.7 29.6
2012 45.0 57.4 32.6
2013 Unavailable Unavailable Unavailable
2014 41.5 52.9 30.0
2015 45.6 58.0 33.3
2016 Unavailable Unavailable Unavailable
2017 44.2 55.9 32.6
2018 40.7 51.4 30.0
2019 39.6 50.2 28.9
2020 Unavailable Unavailable Unavailable
2021 Unavailable 57.9 Unavailable
2022 Unavailable Unavailable Unavailable
2023 44.6 55.8 33.4
2024 45.1 56.5 33.7
2025 44.1 55.9 32.3
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.