Frost dates in Harrietta, MI
The average last spring frost in Harrietta is around June 13 and the first fall frost is around September 17. That gives Harrietta an average growing season of about 96 days.
Last spring frost
| Early (10% chance after) | May 10 |
|---|---|
| Average (50%) | June 13 |
| Late (90%) | July 4 |
First fall frost
| Early (10%) | August 30 |
|---|---|
| Average (50%) | September 17 |
| Late (90% chance before) | September 28 |