Weather Forecast and Radar for Glen Carbon, Illinois

Weather in Glen Carbon, IL

The weather in Glen Carbon, Illinois, United States, is generally mild, with four distinct seasons.

In the winter months, temperatures range from an average of 28°F in January to an average of 41°F in February and March. Snowfall averages around 13 inches per year, with occasional snow and ice storms.

In the spring, temperatures rise, with an average of 56°F in April and 73°F in May. Rainfall is common during this time of year, with an average of 3.54 inches in April and 4.34 inches in May.

Summer temperatures reach their peak from June to August, with an average of 84°F in June, 85°F in July, and 84°F in August. Thunderstorms are common during the summer months, with an average of 4.34 inches of rainfall in June, 4.64 inches in July, and 4.44 inches in August.

The fall months bring cooler temperatures and fewer storms, with an average of 68°F in September, 56°F in October, and 44°F in November. Rainfall averages around 3.14 inches in September, 2.54 inches in October, and 2.04 inches in November.

Fast Facts About Glen Carbon, IL

As of 2020, the city population is 12468.

Major Cities Nearby Glen Carbon, IL

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