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Saint Charles climate
Typical historical weather for Saint Charles, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for Saint Charles.
Annual average
8.5°C
across all months
Warmest month
27.3°C
Jul average high
Coolest month
-11.4°C
Jan average low
Annual rainfall
1035mm
total per year
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
● Avg high● Avg low▮ Rainfall
Records on file
Hottest day
36.5°C
23 August 2023
Coldest day
-34.5°C
31 January 2019
Wettest day
71.5mm
7 August 2021
Windiest day
8.7m/s
26 November 2025
See the detail: Saint Charles on 7 August 2021.