Frost dates in St. Bonifacius, MN
The average last spring frost in St. Bonifacius is around April 30 and the first fall frost is around October 6. That gives St. Bonifacius an average growing season of about 159 days.
Last spring frost
| Early (10% chance after) | April 17 |
|---|---|
| Average (50%) | April 30 |
| Late (90%) | May 16 |
First fall frost
| Early (10%) | September 15 |
|---|---|
| Average (50%) | October 6 |
| Late (90% chance before) | October 13 |