Frost dates in Oswego, KS
The average last spring frost in Oswego is around April 10 and the first fall frost is around October 20. That gives Oswego an average growing season of about 193 days.
Last spring frost
| Early (10% chance after) | March 22 |
|---|---|
| Average (50%) | April 10 |
| Late (90%) | May 3 |
First fall frost
| Early (10%) | October 6 |
|---|---|
| Average (50%) | October 20 |
| Late (90% chance before) | November 2 |