Weather Forecast and Radar for St. Charles, Illinois

Weather in St. Charles, IL

St. Charles, Illinois has a continental climate with four distinct seasons. In the winter, temperatures average in the upper 20s to low 30s Fahrenheit (-1 to 2 °C). Occasional cold snaps can bring temperatures as low as 0 °F (-18 °C). Snowfall averages around 24 inches (60 cm) per season.

In the spring, temperatures average in the mid-40s to mid-60s Fahrenheit (7 to 19 °C). April and May are the wettest months of the season, with an average of 4 inches (10 cm) of precipitation.

The summer is usually hot and humid, with temperatures ranging from the mid-60s to mid-80s Fahrenheit (19 to 28 °C). July and August are the hottest months of the year, with temperatures often reaching into the low 90s Fahrenheit (32 to 34 °C). The average rainfall during this season is 3 inches (7.5 cm).

In the fall, temperatures range from the mid-30s to low 60s Fahrenheit (1 to 17 °C). Rainfall averages around 3 inches (7.5 cm) per month.

Overall, St. Charles has a moderate climate with temperatures rarely dropping below 0 °F (-18 °C) or rising above 90 °F (32 °C).

Fast Facts About St. Charles, IL

As of 2020, the city population is 32612.

Major Cities Nearby St. Charles, IL

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for St. Charles, Illinois.