Frost dates in Onarga, IL
The average last spring frost in Onarga is around April 27 and the first fall frost is around October 12. That gives Onarga an average growing season of about 168 days.
Last spring frost
| Early (10% chance after) | April 12 |
|---|---|
| Average (50%) | April 27 |
| Late (90%) | May 9 |
First fall frost
| Early (10%) | September 27 |
|---|---|
| Average (50%) | October 12 |
| Late (90% chance before) | October 28 |