How deep is the frostline in Naperville Illinois?

Answer 1

I saw a good chart of average frost penetration for Illinois.

10" to 20" for southern Illinois

15" to 30" for central Illinois (frost line for Peoria)

20" to 35" for northern Illinois

Answer 2

The frost line in Naperville, Illinois typically ranges from 30 to 48 inches deep. This is the depth at which the ground is expected to freeze during the winter months. It's important to take this into consideration for construction projects or when installing underground utilities to prevent damage from freezing temperatures.

Answer 3

The average first frost in Peoria IL occurs around October 19th. The earliest first frost in Peoria was on September 20th. The latest first frost occurred on November 12th.

Answer 4

The frost is most likely 36 to 40 inches deep, at the frost line. The ground will never freeze below that level.

Answer 5

Nearby Wheaton has a frostline depth of 42 inches, so Naperville should have close to the same.

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