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Fallon CDP, Montana

Official LSAD Designation: Fallon CDP • Census GEOID: 3025375 • Prairie County

Climate Normals & Weather Observations

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

Reference Weather Station: TERRY, MT US (ID: USC00248165) • Located 8.8 miles from community center • Elevation: 685.8 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 28.4° 6.1° 17.2° 0.29"
February 33.7° 10.8° 22.2° 0.34"
March 46.2° 21.5° 33.8° 0.44"
April 57.9° 32.2° 45.0° 1.43"
May 68.0° 42.7° 55.4° 2.51"
June 78.2° 52.6° 65.4° 2.36"
July 88.1° 58.5° 73.3° 1.90"
August 87.0° 56.0° 71.5° 1.31"
September 75.7° 45.3° 60.5° 1.17"
October 59.1° 32.7° 45.9° 0.92"
November 43.8° 20.0° 31.9° 0.37"
December 32.2° 9.7° 21.0° 0.32"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station TERRY, MT US (ID: USC00248165) • 8.8 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 TERRY, 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. 27.0 36.5 46.0 55.5 65.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 42.8°F 2011: Annual mean 44.0°F 2013: Annual mean 44.7°F 2017: Annual mean 46.1°F 2018: Annual mean 42.3°F 2020: Annual mean 46.7°F 2021: Annual mean 47.4°F 2022: Annual mean 44.5°F 2023: Annual mean 46.9°F 2024: Annual mean 47.8°F 2025: Annual mean 47.1°F 2010: Annual mean of daily highs 55.1°F 2011: Annual mean of daily highs 56.4°F 2013: Annual mean of daily highs 57.2°F 2017: Annual mean of daily highs 59.0°F 2018: Annual mean of daily highs 54.4°F 2020: Annual mean of daily highs 60.0°F 2021: Annual mean of daily highs 61.6°F 2022: Annual mean of daily highs 57.6°F 2023: Annual mean of daily highs 59.5°F 2024: Annual mean of daily highs 61.0°F 2025: Annual mean of daily highs 60.1°F 2010: Annual mean of daily lows 30.4°F 2011: Annual mean of daily lows 31.5°F 2013: Annual mean of daily lows 32.3°F 2017: Annual mean of daily lows 33.2°F 2018: Annual mean of daily lows 30.2°F 2020: Annual mean of daily lows 33.4°F 2021: Annual mean of daily lows 33.3°F 2022: Annual mean of daily lows 31.5°F 2023: Annual mean of daily lows 34.3°F 2024: Annual mean of daily lows 34.5°F 2025: Annual mean of daily lows 34.0°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 42.8 55.1 30.4
2011 44.0 56.4 31.5
2012 Unavailable Unavailable Unavailable
2013 44.7 57.2 32.3
2014 Unavailable Unavailable Unavailable
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 46.1 59.0 33.2
2018 42.3 54.4 30.2
2019 Unavailable Unavailable Unavailable
2020 46.7 60.0 33.4
2021 47.4 61.6 33.3
2022 44.5 57.6 31.5
2023 46.9 59.5 34.3
2024 47.8 61.0 34.5
2025 47.1 60.1 34.0
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.