Frost dates in Johnston, SC
The average last spring frost in Johnston is around March 26 and the first fall frost is around November 3. That gives Johnston an average growing season of about 222 days.
Last spring frost
| Early (10% chance after) | March 12 |
|---|---|
| Average (50%) | March 26 |
| Late (90%) | April 18 |
First fall frost
| Early (10%) | October 19 |
|---|---|
| Average (50%) | November 3 |
| Late (90% chance before) | November 26 |