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St. Charles city, Missouri

Official LSAD Designation: St. Charles city • Census GEOID: 2964082 • St. Charles County

Climate Normals & Weather Observations

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

Reference Weather Station: ST CHARLES ELM PT, MO US (ID: USC00237397) • Located 1.3 miles from community center • Elevation: 143.9 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 39.5° 21.9° 30.7° 2.74"
February 44.7° 25.2° 35.0° 2.86"
March 55.2° 33.7° 44.4° 3.63"
April 66.8° 44.0° 55.4° 5.11"
May 76.0° 55.1° 65.5° 5.45"
June 84.1° 64.3° 74.2° 4.35"
July 88.0° 68.3° 78.2° 4.20"
August 86.8° 65.8° 76.3° 4.07"
September 80.4° 57.2° 68.8° 3.08"
October 68.8° 45.7° 57.3° 3.50"
November 55.3° 35.3° 45.3° 3.73"
December 44.1° 26.4° 35.2° 2.99"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station ST CHARLES ELM PT, MO US (ID: USC00237397) • 1.3 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 ST CHARLES ELM PT, MO 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. 39.0 47.5 56.0 64.5 73.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2014: Annual mean 52.5°F 2016: Annual mean 57.5°F 2017: Annual mean 57.7°F 2018: Annual mean 55.8°F 2019: Annual mean 55.6°F 2021: Annual mean 56.8°F 2023: Annual mean 58.4°F 2024: Annual mean 58.6°F 2014: Annual mean of daily highs 62.9°F 2016: Annual mean of daily highs 67.7°F 2017: Annual mean of daily highs 68.6°F 2018: Annual mean of daily highs 66.0°F 2019: Annual mean of daily highs 65.3°F 2021: Annual mean of daily highs 67.1°F 2023: Annual mean of daily highs 69.6°F 2024: Annual mean of daily highs 69.3°F 2014: Annual mean of daily lows 42.2°F 2016: Annual mean of daily lows 47.2°F 2017: Annual mean of daily lows 46.7°F 2018: Annual mean of daily lows 45.5°F 2019: Annual mean of daily lows 46.0°F 2020: Annual mean of daily lows 45.9°F 2021: Annual mean of daily lows 46.5°F 2023: Annual mean of daily lows 47.3°F 2024: Annual mean of daily lows 47.9°F 2025: Annual mean of daily lows 46.5°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 Unavailable Unavailable
2012 Unavailable Unavailable Unavailable
2013 Unavailable Unavailable Unavailable
2014 52.5 62.9 42.2
2015 Unavailable Unavailable Unavailable
2016 57.5 67.7 47.2
2017 57.7 68.6 46.7
2018 55.8 66.0 45.5
2019 55.6 65.3 46.0
2020 Unavailable Unavailable 45.9
2021 56.8 67.1 46.5
2022 Unavailable Unavailable Unavailable
2023 58.4 69.6 47.3
2024 58.6 69.3 47.9
2025 Unavailable Unavailable 46.5
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.