Weather Forecast and Radar for Summit, Illinois

Weather in Summit, IL

Summit, Illinois, United States experiences a wide range of weather throughout the year. In winter, temperatures can plunge to below freezing levels with an average low of 20°F in January. Snowfall is common, with December being the snowiest month with an average of 5 inches of snow. In spring, temperatures start to warm up, with an average high of 57°F in April. Rainfall also increases during this season, with May being the wettest month with an average of 4.2 inches of rain. Summer is humid and warm, with an average high of 85°F in July and August. Thunderstorms are common in the summer months, and July is the month with the most thunderstorm days, with an average of 8. In autumn, temperatures cool down again, with an average low of 45°F in October. Rainfall also decreases in autumn, with September usually being the driest month with an average of 2.5 inches of rain.

Fast Facts About Summit, IL

As of 2020, the city population is 11171.

Major Cities Nearby Summit, IL

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