Frost dates in St. John, KS
The average last spring frost in St. John is around April 14 and the first fall frost is around October 25. That gives St. John an average growing season of about 194 days.
Last spring frost
| Early (10% chance after) | March 30 |
|---|---|
| Average (50%) | April 14 |
| Late (90%) | May 1 |
First fall frost
| Early (10%) | October 7 |
|---|---|
| Average (50%) | October 25 |
| Late (90% chance before) | November 8 |