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Stephan CDP, South Dakota

Official LSAD Designation: Stephan CDP • Census GEOID: 4661580 • Hyde County

Climate Normals & Weather Observations

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

Reference Weather Station: STEPHAN 2 NW, SD US (ID: USC00397992) • Located 1.4 miles from community center • Elevation: 550.2 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 25.9° 5.0° 15.4° 0.47"
February 30.7° 8.3° 19.5° 0.66"
March 43.7° 18.9° 31.3° 0.98"
April 56.8° 30.7° 43.8° 1.95"
May 68.4° 43.2° 55.8° 3.18"
June 78.5° 54.0° 66.2° 3.80"
July 85.3° 59.6° 72.4° 2.89"
August 83.9° 57.5° 70.7° 2.17"
September 76.1° 47.3° 61.7° 1.95"
October 60.2° 33.0° 46.6° 1.89"
November 43.9° 19.7° 31.8° 0.63"
December 30.5° 9.7° 20.1° 0.60"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station LAKE SHARPE PRJ, SD US (ID: USC00394766) • 12.8 miles from community center .

This annual reference station differs from the monthly normals station (ID: USC00397992), which has no available annual mean history.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at LAKE SHARPE PRJ, 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. 28.0 37.5 47.0 56.5 66.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2014: Annual mean 44.8°F 2015: Annual mean 48.5°F 2016: Annual mean 49.5°F 2018: Annual mean 45.1°F 2025: Annual mean 48.7°F 2014: Annual mean of daily highs 57.8°F 2015: Annual mean of daily highs 61.6°F 2016: Annual mean of daily highs 61.9°F 2018: Annual mean of daily highs 56.8°F 2024: Annual mean of daily highs 60.6°F 2025: Annual mean of daily highs 62.0°F 2014: Annual mean of daily lows 31.7°F 2015: Annual mean of daily lows 35.5°F 2016: Annual mean of daily lows 37.0°F 2018: Annual mean of daily lows 33.5°F 2025: Annual mean of daily lows 35.4°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 44.8 57.8 31.7
2015 48.5 61.6 35.5
2016 49.5 61.9 37.0
2017 Unavailable Unavailable Unavailable
2018 45.1 56.8 33.5
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 Unavailable Unavailable Unavailable
2023 Unavailable Unavailable Unavailable
2024 Unavailable 60.6 Unavailable
2025 48.7 62.0 35.4
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.