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Boneau CDP, Montana

Official LSAD Designation: Boneau CDP • Census GEOID: 3008162 • Chouteau County

Climate Normals & Weather Observations

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

Reference Weather Station: BIG SANDY, MT US (ID: USC00240770) • Located 14.0 miles from community center • Elevation: 844.3 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 30.8° 9.8° 20.3° 0.45"
February 35.2° 13.4° 24.3° 0.39"
March 46.0° 22.0° 34.0° 0.47"
April 58.4° 32.6° 45.5° 1.27"
May 67.9° 41.2° 54.6° 2.07"
June 75.9° 48.9° 62.4° 3.12"
July 85.9° 54.6° 70.3° 1.40"
August 84.8° 53.4° 69.1° 0.99"
September 73.7° 44.2° 59.0° 1.16"
October 58.7° 32.5° 45.6° 0.93"
November 43.6° 21.5° 32.6° 0.60"
December 33.5° 13.0° 23.3° 0.43"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station BIG SANDY, MT US (ID: USC00240770) • 14.0 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 BIG SANDY, 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. 29.0 37.8 46.5 55.3 64.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2014: Annual mean 44.4°F 2015: Annual mean 47.3°F 2017: Annual mean 45.4°F 2023: Annual mean 47.2°F 2014: Annual mean of daily highs 56.6°F 2015: Annual mean of daily highs 60.3°F 2017: Annual mean of daily highs 58.1°F 2023: Annual mean of daily highs 59.5°F 2014: Annual mean of daily lows 32.3°F 2015: Annual mean of daily lows 34.4°F 2017: Annual mean of daily lows 32.8°F 2023: Annual mean of daily lows 34.9°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 Unavailable Unavailable Unavailable
2012 Unavailable Unavailable Unavailable
2013 Unavailable Unavailable Unavailable
2014 44.4 56.6 32.3
2015 47.3 60.3 34.4
2016 Unavailable Unavailable Unavailable
2017 45.4 58.1 32.8
2018 Unavailable Unavailable Unavailable
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 Unavailable Unavailable Unavailable
2023 47.2 59.5 34.9
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.