Frost dates in Palmyra, IL
The average last spring frost in Palmyra is around April 19 and the first fall frost is around October 14. That gives Palmyra an average growing season of about 178 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 19 |
| Late (90%) | May 5 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 14 |
| Late (90% chance before) | October 29 |