Weather Forecast and Radar for Eureka, Illinois

Weather in Eureka, IL

Eureka, Illinois is located in the Midwestern United States and experiences an array of temperatures throughout the year. The warmest months are typically June, July and August when temperatures can reach highs of around 90°F (32°C) while the coldest months of December, January and February can dip to lows of around 25°F (-4°C).

In the spring, temperatures begin to warm up and can range from the mid-30s to the mid-70s. April is usually the wettest month, with an average of 4.62 inches (117mm) of rain. The summer months are usually hot and humid, with temperatures usually reaching the mid-80s (around 29°C).

The autumn months of September, October and November see temperatures gradually decline and range between the mid-50s and the mid-70s (around 21°C). October is usually the driest month, with an average of only 2.81 inches (71mm) of rain.

Finally, winter in Eureka can be quite cold, with temperatures dropping to the low 20s (around -6°C) and snowfall occurring regularly. January is usually the snowiest month, with an average of 9.8 inches (25cm) of snow.

Fast Facts About Eureka, IL

As of 2020, the city population is 5485.

Major Cities Nearby Eureka, IL

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