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Mountain Plains CDP, South Dakota

Official LSAD Designation: Mountain Plains CDP • Census GEOID: 4644032 • Lawrence County

Climate Normals & Weather Observations

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

Reference Weather Station: SPEARFISH, SD US (ID: USC00397882) • Located 2.1 miles from community center • Elevation: 1,107.3 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 35.9° 15.7° 25.8° 0.60"
February 36.9° 16.3° 26.6° 0.91"
March 45.8° 24.2° 35.0° 1.19"
April 54.9° 32.0° 43.5° 2.23"
May 64.3° 41.8° 53.1° 3.72"
June 75.3° 51.3° 63.3° 3.51"
July 83.6° 57.6° 70.6° 2.35"
August 82.9° 56.1° 69.5° 1.88"
September 74.0° 47.6° 60.8° 1.56"
October 58.1° 35.4° 46.8° 2.04"
November 45.9° 25.6° 35.7° 0.70"
December 37.2° 17.5° 27.3° 0.72"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station SPEARFISH, SD US (ID: USC00397882) • 2.1 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 SPEARFISH, SD 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. 29.0 38.8 48.5 58.3 68.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2012: Annual mean 51.7°F 2014: Annual mean 45.8°F 2015: Annual mean 50.2°F 2019: Annual mean 43.0°F 2020: Annual mean 47.4°F 2021: Annual mean 48.3°F 2022: Annual mean 46.7°F 2023: Annual mean 48.4°F 2024: Annual mean 48.5°F 2025: Annual mean 47.4°F 2012: Annual mean of daily highs 63.9°F 2014: Annual mean of daily highs 56.6°F 2015: Annual mean of daily highs 61.0°F 2019: Annual mean of daily highs 53.8°F 2020: Annual mean of daily highs 59.0°F 2021: Annual mean of daily highs 60.1°F 2022: Annual mean of daily highs 58.9°F 2023: Annual mean of daily highs 59.5°F 2024: Annual mean of daily highs 60.3°F 2025: Annual mean of daily highs 58.4°F 2012: Annual mean of daily lows 39.5°F 2014: Annual mean of daily lows 35.1°F 2015: Annual mean of daily lows 39.4°F 2019: Annual mean of daily lows 32.2°F 2020: Annual mean of daily lows 35.7°F 2021: Annual mean of daily lows 36.4°F 2022: Annual mean of daily lows 34.4°F 2023: Annual mean of daily lows 37.2°F 2024: Annual mean of daily lows 36.6°F 2025: Annual mean of daily lows 36.3°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 51.7 63.9 39.5
2013 Unavailable Unavailable Unavailable
2014 45.8 56.6 35.1
2015 50.2 61.0 39.4
2016 Unavailable Unavailable Unavailable
2017 Unavailable Unavailable Unavailable
2018 Unavailable Unavailable Unavailable
2019 43.0 53.8 32.2
2020 47.4 59.0 35.7
2021 48.3 60.1 36.4
2022 46.7 58.9 34.4
2023 48.4 59.5 37.2
2024 48.5 60.3 36.6
2025 47.4 58.4 36.3
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.