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Hamilton city, Montana

Official LSAD Designation: Hamilton city • Census GEOID: 3033775 • Ravalli County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Hamilton city.

Reference Weather Station: HAMILTON, MT US (ID: USC00243885) • Located 0.6 miles from community center • Elevation: 1,092.7 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 35.1° 18.9° 27.0° 0.96"
February 39.2° 19.5° 29.3° 1.18"
March 48.9° 24.6° 36.7° 0.98"
April 56.1° 30.7° 43.4° 1.12"
May 65.5° 38.2° 51.9° 1.53"
June 73.0° 44.7° 58.9° 1.65"
July 84.0° 49.7° 66.8° 0.85"
August 82.4° 47.7° 65.0° 0.80"
September 71.9° 40.4° 56.2° 0.81"
October 56.8° 30.9° 43.9° 0.94"
November 42.6° 23.2° 32.9° 1.45"
December 33.5° 17.9° 25.7° 1.33"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station HAMILTON, MT US (ID: USC00243885) • 0.6 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 HAMILTON, 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. 28.0 37.5 47.0 56.5 66.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 45.2°F 2011: Annual mean 45.2°F 2012: Annual mean 47.2°F 2013: Annual mean 46.4°F 2014: Annual mean 46.2°F 2015: Annual mean 48.0°F 2018: Annual mean 45.8°F 2021: Annual mean 46.4°F 2010: Annual mean of daily highs 58.3°F 2011: Annual mean of daily highs 58.7°F 2012: Annual mean of daily highs 61.2°F 2013: Annual mean of daily highs 60.4°F 2014: Annual mean of daily highs 59.7°F 2015: Annual mean of daily highs 62.3°F 2018: Annual mean of daily highs 57.7°F 2021: Annual mean of daily highs 59.2°F 2010: Annual mean of daily lows 32.0°F 2011: Annual mean of daily lows 31.8°F 2012: Annual mean of daily lows 33.1°F 2013: Annual mean of daily lows 32.3°F 2014: Annual mean of daily lows 32.7°F 2015: Annual mean of daily lows 33.7°F 2018: Annual mean of daily lows 33.9°F 2021: Annual mean of daily lows 33.7°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 45.2 58.3 32.0
2011 45.2 58.7 31.8
2012 47.2 61.2 33.1
2013 46.4 60.4 32.3
2014 46.2 59.7 32.7
2015 48.0 62.3 33.7
2016 Unavailable Unavailable Unavailable
2017 Unavailable Unavailable Unavailable
2018 45.8 57.7 33.9
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 46.4 59.2 33.7
2022 Unavailable Unavailable Unavailable
2023 Unavailable Unavailable Unavailable
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.