Frost dates in Stillman Valley, IL
The average last spring frost in Stillman Valley is around April 28 and the first fall frost is around October 11. That gives Stillman Valley an average growing season of about 166 days.
Last spring frost
| Early (10% chance after) | April 16 |
|---|---|
| Average (50%) | April 28 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | September 26 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 28 |