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St. Charles city, Illinois

Official LSAD Designation: St. Charles city • Census GEOID: 1766703 • DuPage County / Kane County

Climate Normals & Weather Observations

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

Reference Weather Station: WEST CHICAGO DUPAGE AP, IL US (ID: USW00094892) • Located 3.3 miles from community center • Elevation: 229.8 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 30.5° 16.1° 23.3° 1.27"
February 34.9° 19.0° 27.0° 1.24"
March 47.0° 28.3° 37.7° 1.97"
April 59.6° 37.9° 48.8° 3.44"
May 70.9° 48.7° 59.8° 4.34"
June 80.6° 58.9° 69.7° 3.65"
July 84.0° 63.3° 73.7° 3.62"
August 82.0° 61.8° 71.9° 3.84"
September 75.5° 53.7° 64.6° 3.00"
October 62.4° 42.0° 52.2° 2.99"
November 47.7° 31.1° 39.4° 2.20"
December 35.4° 21.4° 28.4° 1.67"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station WEST CHICAGO DUPAGE AP, IL US (ID: USW00094892) • 3.3 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 WEST CHICAGO DUPAGE AP, 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. 33.0 41.3 49.5 57.8 66.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 50.3°F 2011: Annual mean 49.8°F 2012: Annual mean 52.4°F 2013: Annual mean 47.6°F 2014: Annual mean 46.6°F 2015: Annual mean 49.2°F 2016: Annual mean 51.3°F 2017: Annual mean 50.6°F 2018: Annual mean 49.1°F 2019: Annual mean 49.5°F 2020: Annual mean 50.8°F 2021: Annual mean 51.2°F 2022: Annual mean 49.4°F 2023: Annual mean 51.7°F 2025: Annual mean 50.8°F 2010: Annual mean of daily highs 60.2°F 2011: Annual mean of daily highs 59.2°F 2012: Annual mean of daily highs 63.1°F 2013: Annual mean of daily highs 57.5°F 2014: Annual mean of daily highs 56.6°F 2015: Annual mean of daily highs 59.0°F 2016: Annual mean of daily highs 60.7°F 2017: Annual mean of daily highs 60.6°F 2018: Annual mean of daily highs 58.8°F 2019: Annual mean of daily highs 58.9°F 2020: Annual mean of daily highs 60.6°F 2021: Annual mean of daily highs 61.2°F 2022: Annual mean of daily highs 59.3°F 2023: Annual mean of daily highs 61.5°F 2025: Annual mean of daily highs 60.9°F 2010: Annual mean of daily lows 40.3°F 2011: Annual mean of daily lows 40.4°F 2012: Annual mean of daily lows 41.8°F 2013: Annual mean of daily lows 37.6°F 2014: Annual mean of daily lows 36.6°F 2015: Annual mean of daily lows 39.4°F 2016: Annual mean of daily lows 41.8°F 2017: Annual mean of daily lows 40.7°F 2018: Annual mean of daily lows 39.4°F 2019: Annual mean of daily lows 40.2°F 2020: Annual mean of daily lows 40.9°F 2021: Annual mean of daily lows 41.3°F 2022: Annual mean of daily lows 39.6°F 2023: Annual mean of daily lows 41.9°F 2025: Annual mean of daily lows 40.7°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 50.3 60.2 40.3
2011 49.8 59.2 40.4
2012 52.4 63.1 41.8
2013 47.6 57.5 37.6
2014 46.6 56.6 36.6
2015 49.2 59.0 39.4
2016 51.3 60.7 41.8
2017 50.6 60.6 40.7
2018 49.1 58.8 39.4
2019 49.5 58.9 40.2
2020 50.8 60.6 40.9
2021 51.2 61.2 41.3
2022 49.4 59.3 39.6
2023 51.7 61.5 41.9
2024 Unavailable Unavailable Unavailable
2025 50.8 60.9 40.7
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.