Frost dates in Irmo, SC
The average last spring frost in Irmo is around April 13 and the first fall frost is around October 27. That gives Irmo an average growing season of about 197 days.
Last spring frost
| Early (10% chance after) | April 4 |
|---|---|
| Average (50%) | April 13 |
| Late (90%) | April 26 |
First fall frost
| Early (10%) | October 17 |
|---|---|
| Average (50%) | October 27 |
| Late (90% chance before) | November 6 |