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Sedan CDP, Montana

Official LSAD Designation: Sedan CDP • Census GEOID: 3067075 • Gallatin County

Climate Normals & Weather Observations

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

Reference Weather Station: WILSALL 1S, MT US (ID: USC00241840) • Located 10.9 miles from community center • Elevation: 1,528.6 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 30.9° 10.6° 20.8° 0.51"
February 35.9° 13.5° 24.7° 0.56"
March 42.9° 21.0° 32.0° 1.07"
April 52.4° 26.0° 39.2° 1.75"
May 61.4° 36.6° 49.0° 2.27"
June 71.1° 41.4° 56.3° 2.35"
July 83.6° 48.5° 66.1° 1.40"
August 82.4° 47.3° 64.9° 1.13"
September 70.0° 35.4° 52.7° 1.32"
October 55.9° 28.9° 42.4° 1.31"
November 42.1° 15.4° 28.8° 0.74"
December 33.6° 9.7° 21.7° 0.48"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station WILSALL 1S, MT US (ID: USC00241840) • 10.9 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 WILSALL 1S, 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. 19.0 29.0 39.0 49.0 59.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2018: Annual mean 39.0°F 2022: Annual mean 37.5°F 2023: Annual mean 37.5°F 2024: Annual mean 40.4°F 2025: Annual mean 40.6°F 2018: Annual mean of daily highs 52.3°F 2022: Annual mean of daily highs 52.5°F 2023: Annual mean of daily highs 51.2°F 2024: Annual mean of daily highs 55.7°F 2025: Annual mean of daily highs 54.7°F 2018: Annual mean of daily lows 25.8°F 2022: Annual mean of daily lows 22.5°F 2023: Annual mean of daily lows 23.9°F 2024: Annual mean of daily lows 25.1°F 2025: Annual mean of daily lows 26.5°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 Unavailable Unavailable Unavailable
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 Unavailable Unavailable Unavailable
2018 39.0 52.3 25.8
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 37.5 52.5 22.5
2023 37.5 51.2 23.9
2024 40.4 55.7 25.1
2025 40.6 54.7 26.5
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.