Frost dates in Niagara, WI
The average last spring frost in Niagara is around May 25 and the first fall frost is around September 23. That gives Niagara an average growing season of about 121 days.
Last spring frost
| Early (10% chance after) | May 12 |
|---|---|
| Average (50%) | May 25 |
| Late (90%) | June 11 |
First fall frost
| Early (10%) | September 8 |
|---|---|
| Average (50%) | September 23 |
| Late (90% chance before) | October 7 |