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Westby town, Montana

Official LSAD Designation: Westby town • Census GEOID: 3078925 • Sheridan County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Westby town.

Reference Weather Station: WESTBY, MT US (ID: USC00248777) • Located 0.4 miles from community center • Elevation: 641.0 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 19.5° -2.2° 8.7° 0.37"
February 23.5° 2.1° 12.8° 0.34"
March 35.7° 14.2° 25.0° 0.55"
April 52.6° 27.3° 39.9° 0.98"
May 65.3° 39.5° 52.4° 2.17"
June 73.1° 49.9° 61.5° 3.14"
July 79.9° 54.6° 67.3° 2.49"
August 80.0° 51.8° 65.9° 1.64"
September 69.6° 41.1° 55.4° 1.26"
October 53.5° 28.6° 41.0° 0.97"
November 36.1° 14.6° 25.4° 0.52"
December 23.7° 3.8° 13.7° 0.48"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station WESTBY, MT US (ID: USC00248777) • 0.4 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 WESTBY, 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. 25.0 33.3 41.5 49.8 58.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2011: Annual mean 38.9°F 2021: Annual mean 41.3°F 2024: Annual mean 41.8°F 2025: Annual mean 40.0°F 2011: Annual mean of daily highs 50.0°F 2016: Annual mean of daily highs 54.4°F 2021: Annual mean of daily highs 53.7°F 2024: Annual mean of daily highs 53.8°F 2025: Annual mean of daily highs 50.9°F 2011: Annual mean of daily lows 27.8°F 2021: Annual mean of daily lows 28.9°F 2024: Annual mean of daily lows 29.9°F 2025: Annual mean of daily lows 29.0°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 Unavailable Unavailable Unavailable
2011 38.9 50.0 27.8
2012 Unavailable Unavailable Unavailable
2013 Unavailable Unavailable Unavailable
2014 Unavailable Unavailable Unavailable
2015 Unavailable Unavailable Unavailable
2016 Unavailable 54.4 Unavailable
2017 Unavailable Unavailable Unavailable
2018 Unavailable Unavailable Unavailable
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 41.3 53.7 28.9
2022 Unavailable Unavailable Unavailable
2023 Unavailable Unavailable Unavailable
2024 41.8 53.8 29.9
2025 40.0 50.9 29.0
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.