Frost dates in Byron, MN
The average last spring frost in Byron is around May 18 and the first fall frost is around September 25. That gives Byron an average growing season of about 130 days.
Last spring frost
| Early (10% chance after) | May 4 |
|---|---|
| Average (50%) | May 18 |
| Late (90%) | May 23 |
First fall frost
| Early (10%) | September 14 |
|---|---|
| Average (50%) | September 25 |
| Late (90% chance before) | October 10 |