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Westervelt CDP, Illinois

Official LSAD Designation: Westervelt CDP • Census GEOID: 1780255 • Shelby County

Climate Normals & Weather Observations

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

Reference Weather Station: SHELBYVILLE DAM, IL US (ID: USC00117876) • Located 6.8 miles from community center • Elevation: 198.1 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 35.9° 19.2° 27.6° 2.60"
February 41.1° 22.9° 32.0° 2.07"
March 51.9° 32.1° 42.0° 2.71"
April 64.0° 43.1° 53.6° 4.33"
May 73.7° 54.3° 64.0° 4.65"
June 82.5° 63.4° 72.9° 4.68"
July 86.0° 66.6° 76.3° 4.06"
August 84.9° 64.6° 74.7° 3.41"
September 79.6° 56.6° 68.1° 3.06"
October 67.1° 44.8° 55.9° 3.57"
November 52.3° 33.5° 42.9° 3.71"
December 40.6° 24.7° 32.6° 2.59"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station SHELBYVILLE DAM, IL US (ID: USC00117876) • 6.8 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 SHELBYVILLE DAM, IL 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. 37.0 45.5 54.0 62.5 71.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 53.7°F 2011: Annual mean 54.1°F 2012: Annual mean 57.1°F 2013: Annual mean 52.2°F 2014: Annual mean 50.3°F 2017: Annual mean 55.9°F 2022: Annual mean 52.8°F 2023: Annual mean 56.0°F 2024: Annual mean 56.2°F 2025: Annual mean 54.7°F 2010: Annual mean of daily highs 63.6°F 2011: Annual mean of daily highs 63.6°F 2012: Annual mean of daily highs 67.8°F 2013: Annual mean of daily highs 62.0°F 2014: Annual mean of daily highs 60.2°F 2017: Annual mean of daily highs 66.1°F 2022: Annual mean of daily highs 62.8°F 2023: Annual mean of daily highs 66.2°F 2024: Annual mean of daily highs 65.9°F 2025: Annual mean of daily highs 64.7°F 2010: Annual mean of daily lows 43.8°F 2011: Annual mean of daily lows 44.7°F 2012: Annual mean of daily lows 46.4°F 2013: Annual mean of daily lows 42.5°F 2014: Annual mean of daily lows 40.5°F 2017: Annual mean of daily lows 45.8°F 2019: Annual mean of daily lows 43.9°F 2022: Annual mean of daily lows 42.8°F 2023: Annual mean of daily lows 45.8°F 2024: Annual mean of daily lows 46.5°F 2025: Annual mean of daily lows 44.8°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 53.7 63.6 43.8
2011 54.1 63.6 44.7
2012 57.1 67.8 46.4
2013 52.2 62.0 42.5
2014 50.3 60.2 40.5
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 55.9 66.1 45.8
2018 Unavailable Unavailable Unavailable
2019 Unavailable Unavailable 43.9
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 52.8 62.8 42.8
2023 56.0 66.2 45.8
2024 56.2 65.9 46.5
2025 54.7 64.7 44.8
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.