Weather in September
brings pleasant weather to Indiana
as the mild autumn season arrives in the state. The summer rains recede to register 2" (51mm) to 3" (76mm) by early fall, with a significant reduction in storms. The sun adorns the skies for at least 21 days, with daily sunshine of 7 to 8 hours. Humidity is on the wane with the end of the summer, and the cloud cover is at the thinnest.
The average high temperatures are in the comfortable 73°F (22.8°C) to 82°F (27.8°C) range, while the nights are temperate in the 50°F (10°C) to 60°F (15.6°C) zone. Rochester in the north is between 53°F (11.7°C) to 75°F (23.9°C), while Brookville in the south is slightly warmer between 54°F (12.2°C) to 80°F (26.7°C). Northern Indiana attains peak fall colors earlier than the central and southern parts. The landscape attains beautiful hues by the end of September in most parts.
Fall is the time to pick apples and pumpkins and make campfires. September is one of the best times to visit Indiana.