Frost dates in Fillmore, IL
The average last spring frost in Fillmore is around April 15 and the first fall frost is around October 15. That gives Fillmore an average growing season of about 183 days.
Last spring frost
| Early (10% chance after) | March 31 |
|---|---|
| Average (50%) | April 15 |
| Late (90%) | April 28 |
First fall frost
| Early (10%) | October 4 |
|---|---|
| Average (50%) | October 15 |
| Late (90% chance before) | November 3 |