Frost dates in Zimmerman, MN
The average last spring frost in Zimmerman is around April 30 and the first fall frost is around October 16. That gives Zimmerman an average growing season of about 169 days.
Last spring frost
| Early (10% chance after) | April 15 |
|---|---|
| Average (50%) | April 30 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | October 3 |
|---|---|
| Average (50%) | October 16 |
| Late (90% chance before) | October 29 |