Frost dates in St. Augustine, IL
The average last spring frost in St. Augustine is around April 27 and the first fall frost is around October 12. That gives St. Augustine an average growing season of about 168 days.
Last spring frost
| Early (10% chance after) | April 17 |
|---|---|
| Average (50%) | April 27 |
| Late (90%) | May 8 |
First fall frost
| Early (10%) | October 3 |
|---|---|
| Average (50%) | October 12 |
| Late (90% chance before) | October 28 |