Weather Forecast and Radar for Decatur, Illinois

Weather in Decatur, IL

Decatur, Illinois is located in the central part of the United States, making it a great destination for year-round activities. The weather in Decatur is typically mild, with hot summers and cold winters.

In the summer, temperatures average around 80-90°F (27-32°C). July is the hottest month, with temperatures reaching up to 95°F (35°C). The humidity can be quite high in the summer months, making it feel even hotter.

In the winter, temperatures average around 30-50°F (-1 to 10°C). January is the coldest month, with temperatures dropping as low as 15°F (-9°C). Snowfall is common in the winter months, and the city receives an average of 17 inches (43 cm) of snow annually.

Spring and fall are mild in Decatur, with temperatures ranging from 50-70°F (10-21°C). April is usually the rainiest month, but thunderstorms occur throughout the spring and summer.

Overall, Decatur has a temperate climate and the weather is pleasant year-round.

Fast Facts About Decatur, IL

As of 2020, the city population is 86604.

Major Cities Nearby Decatur, IL

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