Weather Forecast and Radar for St. John, Indiana

Weather in St. John, IN

In St. John, Indiana, United States, the weather is fairly mild year-round. In the winter months, temperatures typically range from 20-40 degrees Fahrenheit (F). January is the coldest month with an average temperature of 33°F. The area occasionally experiences snowfall and cold snaps.

Come springtime, the temperatures begin to rise. March has an average temperature of 45°F while April and May both have an average temperature of 54°F. The spring season is marked by pleasant temperatures and plenty of sunshine.

The summer months in St. John are warm and humid. June, July, and August all have an average temperature of 77°F. The hottest month is July, with temperatures as high as 90°F. Despite the heat, there are plenty of outdoor activities to enjoy during the summer months.

In the fall, the temperatures steadily drop from September to November. September has an average temperature of 70°F, October of 59°F, and November of 43°F. The fall season is characterized by cool evenings, colorful foliage, and occasional rainfall.

Overall, St. John experiences mild temperatures year-round and plenty of sunshine. The area is a great place to enjoy outdoor activities throughout the year.

Fast Facts About St. John, IN

As of 2020, the city population is 18382.

Major Cities Nearby St. John, IN

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for St. John, Indiana.