Skip to main content

River Sioux CDP, Iowa

Official LSAD Designation: River Sioux CDP • Census GEOID: 1967530 • Harrison County

Climate Normals & Weather Observations

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

Reference Weather Station: LITTLE SIOUX 2 NW, IA US (ID: USC00134874) • Located 1.7 miles from community center • Elevation: 312.4 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 29.4° 8.7° 19.1° 0.92"
February 34.3° 12.5° 23.4° 1.30"
March 47.9° 24.3° 36.1° 2.28"
April 61.7° 34.6° 48.2° 3.87"
May 72.5° 47.8° 60.1° 5.06"
June 82.7° 58.5° 70.6° 5.72"
July 85.8° 62.1° 73.9° 4.85"
August 83.3° 60.3° 71.8° 4.54"
September 77.2° 50.2° 63.7° 5.05"
October 64.1° 37.4° 50.8° 2.93"
November 47.9° 23.7° 35.8° 1.74"
December 34.1° 13.5° 23.8° 1.50"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station LITTLE SIOUX 2 NW, IA US (ID: USC00134874) • 1.7 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 LITTLE SIOUX 2 NW, IA 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. 30.0 40.0 50.0 60.0 70.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 47.5°F 2011: Annual mean 47.8°F 2012: Annual mean 51.8°F 2013: Annual mean 46.7°F 2014: Annual mean 46.5°F 2015: Annual mean 49.4°F 2016: Annual mean 50.6°F 2017: Annual mean 50.0°F 2019: Annual mean 46.4°F 2020: Annual mean 49.0°F 2022: Annual mean 48.1°F 2024: Annual mean 51.5°F 2010: Annual mean of daily highs 59.3°F 2011: Annual mean of daily highs 59.7°F 2012: Annual mean of daily highs 65.9°F 2013: Annual mean of daily highs 58.4°F 2014: Annual mean of daily highs 59.0°F 2015: Annual mean of daily highs 61.6°F 2016: Annual mean of daily highs 62.6°F 2017: Annual mean of daily highs 62.1°F 2019: Annual mean of daily highs 57.5°F 2020: Annual mean of daily highs 61.7°F 2022: Annual mean of daily highs 62.4°F 2024: Annual mean of daily highs 64.5°F 2010: Annual mean of daily lows 35.7°F 2011: Annual mean of daily lows 35.8°F 2012: Annual mean of daily lows 37.7°F 2013: Annual mean of daily lows 35.0°F 2014: Annual mean of daily lows 33.9°F 2015: Annual mean of daily lows 37.3°F 2016: Annual mean of daily lows 38.7°F 2017: Annual mean of daily lows 38.0°F 2019: Annual mean of daily lows 35.4°F 2020: Annual mean of daily lows 36.4°F 2022: Annual mean of daily lows 33.7°F 2024: Annual mean of daily lows 38.4°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 47.5 59.3 35.7
2011 47.8 59.7 35.8
2012 51.8 65.9 37.7
2013 46.7 58.4 35.0
2014 46.5 59.0 33.9
2015 49.4 61.6 37.3
2016 50.6 62.6 38.7
2017 50.0 62.1 38.0
2018 Unavailable Unavailable Unavailable
2019 46.4 57.5 35.4
2020 49.0 61.7 36.4
2021 Unavailable Unavailable Unavailable
2022 48.1 62.4 33.7
2023 Unavailable Unavailable Unavailable
2024 51.5 64.5 38.4
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.