Frost dates in Morrison, IL
The average last spring frost in Morrison is around April 27 and the first fall frost is around October 10. That gives Morrison an average growing season of about 166 days.
Last spring frost
| Early (10% chance after) | April 14 |
|---|---|
| Average (50%) | April 27 |
| Late (90%) | May 14 |
First fall frost
| Early (10%) | September 24 |
|---|---|
| Average (50%) | October 10 |
| Late (90% chance before) | October 24 |