Weather Forecast and Radar for Marion, Illinois

Weather in Marion, IL

Marion, Illinois, United States has a temperate climate with four distinct seasons. Summers in Marion are warm and humid, with temperatures ranging from an average high of 86°F in July to an average low of 60°F in August. Winters are cold, with temperatures ranging from an average high of 40°F in January to an average low of 19°F in February. Spring and fall are mild, with temperatures ranging from an average high of 64°F in April to an average low of 38°F in October. Marion receives an average of 42 inches of rainfall per year, with the wettest months being April and May. Snowfall averages 17 inches annually, with the snowiest months being December, January, and February.

Fast Facts About Marion, IL

As of 2020, the city population is 17539.

Major Cities Nearby Marion, IL

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