Skip to main content

Dewey CDP, Montana

Official LSAD Designation: Dewey CDP • Census GEOID: 3020725 • Beaverhead County

Climate Normals & Weather Observations

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

Reference Weather Station: DIVIDE, MT US (ID: USC00242421) • Located 5.0 miles from community center • Elevation: 1,630.7 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 32.7° 10.5° 21.6° 0.27"
February 35.6° 11.7° 23.6° 0.55"
March 44.9° 19.5° 32.2° 0.67"
April 52.3° 26.3° 39.3° 0.89"
May 61.8° 34.9° 48.3° 1.78"
June 69.9° 41.1° 55.5° 2.10"
July 81.6° 46.2° 63.9° 1.05"
August 80.3° 44.2° 62.3° 1.02"
September 70.2° 36.5° 53.3° 1.13"
October 56.5° 27.5° 42.0° 0.83"
November 41.7° 17.0° 29.4° 0.50"
December 31.2° 8.8° 20.0° 0.51"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station DIVIDE, MT US (ID: USC00242421) • 5.0 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 DIVIDE, 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. 22.0 31.8 41.5 51.3 61.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 39.9°F 2011: Annual mean 39.8°F 2012: Annual mean 42.5°F 2014: Annual mean 40.9°F 2010: Annual mean of daily highs 53.3°F 2011: Annual mean of daily highs 53.6°F 2012: Annual mean of daily highs 56.9°F 2013: Annual mean of daily highs 55.0°F 2014: Annual mean of daily highs 54.9°F 2010: Annual mean of daily lows 26.5°F 2011: Annual mean of daily lows 25.9°F 2012: Annual mean of daily lows 28.2°F 2014: Annual mean of daily lows 26.9°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 39.9 53.3 26.5
2011 39.8 53.6 25.9
2012 42.5 56.9 28.2
2013 Unavailable 55.0 Unavailable
2014 40.9 54.9 26.9
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 Unavailable Unavailable Unavailable
2018 Unavailable Unavailable Unavailable
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
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.