Frost dates in Preston, MN
The average last spring frost in Preston is around May 16 and the first fall frost is around September 25. That gives Preston an average growing season of about 132 days.
Last spring frost
| Early (10% chance after) | May 1 |
|---|---|
| Average (50%) | May 16 |
| Late (90%) | May 28 |
First fall frost
| Early (10%) | September 11 |
|---|---|
| Average (50%) | September 25 |
| Late (90% chance before) | October 10 |