Frost dates in Tripoli, IA
The average last spring frost in Tripoli is around May 2 and the first fall frost is around October 5. That gives Tripoli an average growing season of about 156 days.
Last spring frost
| Early (10% chance after) | April 16 |
|---|---|
| Average (50%) | May 2 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 5 |
| Late (90% chance before) | October 20 |