Weather Forecast and Radar for St. Charles, Missouri

Weather in St. Charles, MO

St. Charles, Missouri experiences a four season climate with hot and humid summers, cold winters, and mild spring and autumn.

In the summer months (May to September), temperatures reach up to 90°F, with high humidity and occasional storms. July is the hottest month, with temperatures reaching an average high of 89°F and an average low of 69°F.

The autumn months (October to December) bring cooler temperatures, with an average high of 57°F and an average low of 38°F. November is the coldest month, with temperatures reaching an average low of 33°F.

In the winter months (January to March), temperatures drop to an average high of 44°F and an average low of 25°F. January is the coldest month, with temperatures reaching an average low of 19°F.

The spring months (April to June) bring mild temperatures, with an average high of 71°F and an average low of 50°F. April is the warmest month, with temperatures reaching an average high of 78°F and an average low of 57°F.

Fast Facts About St. Charles, MO

As of 2020, the city population is 70650.

Major Cities Nearby St. Charles, MO

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