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Groton city, South Dakota

Official LSAD Designation: Groton city • Census GEOID: 4626340 • Brown County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Groton city.

Reference Weather Station: ANDOVER #2, SD US (ID: USC00390120) • Located 9.7 miles from community center • Elevation: 450.5 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 21.5° 4.6° 13.0° 0.57"
February 27.1° 8.6° 17.9° 0.57"
March 40.4° 21.3° 30.9° 0.92"
April 55.7° 33.0° 44.4° 2.00"
May 68.1° 45.9° 57.0° 3.19"
June 77.3° 56.2° 66.8° 3.92"
July 81.7° 61.3° 71.5° 3.81"
August 80.4° 59.2° 69.8° 2.74"
September 72.5° 50.3° 61.4° 2.47"
October 57.7° 36.5° 47.1° 2.20"
November 41.4° 22.8° 32.1° 0.78"
December 27.5° 10.6° 19.0° 0.81"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station ANDOVER #2, SD US (ID: USC00390120) • 9.7 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 ANDOVER #2, 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 37.3 45.5 53.8 62.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2013: Annual mean 41.8°F 2014: Annual mean 42.1°F 2015: Annual mean 46.9°F 2016: Annual mean 47.8°F 2017: Annual mean 45.8°F 2018: Annual mean 43.6°F 2021: Annual mean 47.6°F 2022: Annual mean 43.2°F 2023: Annual mean 45.3°F 2024: Annual mean 47.2°F 2025: Annual mean 46.0°F 2011: Annual mean of daily highs 53.6°F 2012: Annual mean of daily highs 59.1°F 2013: Annual mean of daily highs 51.8°F 2014: Annual mean of daily highs 52.4°F 2015: Annual mean of daily highs 57.2°F 2016: Annual mean of daily highs 58.0°F 2017: Annual mean of daily highs 56.2°F 2018: Annual mean of daily highs 53.3°F 2019: Annual mean of daily highs 49.9°F 2020: Annual mean of daily highs 55.7°F 2021: Annual mean of daily highs 58.2°F 2022: Annual mean of daily highs 53.4°F 2023: Annual mean of daily highs 55.2°F 2024: Annual mean of daily highs 56.9°F 2025: Annual mean of daily highs 56.5°F 2013: Annual mean of daily lows 31.8°F 2014: Annual mean of daily lows 31.8°F 2015: Annual mean of daily lows 36.4°F 2016: Annual mean of daily lows 37.5°F 2017: Annual mean of daily lows 35.4°F 2018: Annual mean of daily lows 33.9°F 2021: Annual mean of daily lows 37.0°F 2022: Annual mean of daily lows 32.9°F 2023: Annual mean of daily lows 35.4°F 2024: Annual mean of daily lows 37.5°F 2025: Annual mean of daily lows 35.5°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 53.6 Unavailable
2012 Unavailable 59.1 Unavailable
2013 41.8 51.8 31.8
2014 42.1 52.4 31.8
2015 46.9 57.2 36.4
2016 47.8 58.0 37.5
2017 45.8 56.2 35.4
2018 43.6 53.3 33.9
2019 Unavailable 49.9 Unavailable
2020 Unavailable 55.7 Unavailable
2021 47.6 58.2 37.0
2022 43.2 53.4 32.9
2023 45.3 55.2 35.4
2024 47.2 56.9 37.5
2025 46.0 56.5 35.5
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.