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Roy CDP, Montana

Official LSAD Designation: Roy CDP • Census GEOID: 3064675 • Fergus County

Climate Normals & Weather Observations

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

Reference Weather Station: ROY 8 NE, MT US (ID: USC00247228) • Located 12.0 miles from community center • Elevation: 940.3 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 34.2° 10.4° 22.3° 0.45"
February 37.4° 13.1° 25.3° 0.39"
March 48.0° 21.8° 34.9° 0.52"
April 57.8° 30.3° 44.1° 1.29"
May 67.6° 39.8° 53.7° 2.51"
June 76.2° 47.9° 62.1° 2.63"
July 86.4° 53.9° 70.2° 1.74"
August 86.0° 52.7° 69.4° 1.29"
September 75.5° 43.3° 59.4° 0.94"
October 59.9° 32.1° 46.0° 0.67"
November 45.6° 21.0° 33.3° 0.47"
December 36.1° 12.2° 24.1° 0.42"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station SAND CREEK, MT US (ID: USC00247342) • 20.0 miles from community center .

This annual reference station differs from the monthly normals station (ID: USC00247228), which has no available annual mean history.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at SAND CREEK, 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. 26.0 35.5 45.0 54.5 64.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2011: Annual mean 44.1°F 2014: Annual mean 43.8°F 2015: Annual mean 47.0°F 2016: Annual mean 47.3°F 2017: Annual mean 46.2°F 2019: Annual mean 41.7°F 2020: Annual mean 46.1°F 2021: Annual mean 46.3°F 2022: Annual mean 44.7°F 2011: Annual mean of daily highs 56.2°F 2014: Annual mean of daily highs 56.2°F 2015: Annual mean of daily highs 60.0°F 2016: Annual mean of daily highs 60.0°F 2017: Annual mean of daily highs 59.0°F 2019: Annual mean of daily highs 53.7°F 2020: Annual mean of daily highs 58.8°F 2021: Annual mean of daily highs 60.2°F 2022: Annual mean of daily highs 57.5°F 2011: Annual mean of daily lows 32.0°F 2014: Annual mean of daily lows 31.3°F 2015: Annual mean of daily lows 33.9°F 2016: Annual mean of daily lows 34.7°F 2017: Annual mean of daily lows 33.4°F 2019: Annual mean of daily lows 29.8°F 2020: Annual mean of daily lows 33.4°F 2021: Annual mean of daily lows 32.4°F 2022: Annual mean of daily lows 31.9°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 Unavailable Unavailable Unavailable
2011 44.1 56.2 32.0
2012 Unavailable Unavailable Unavailable
2013 Unavailable Unavailable Unavailable
2014 43.8 56.2 31.3
2015 47.0 60.0 33.9
2016 47.3 60.0 34.7
2017 46.2 59.0 33.4
2018 Unavailable Unavailable Unavailable
2019 41.7 53.7 29.8
2020 46.1 58.8 33.4
2021 46.3 60.2 32.4
2022 44.7 57.5 31.9
2023 Unavailable Unavailable Unavailable
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.