Frost dates in Lone Rock, IA
The average last spring frost in Lone Rock is around May 1 and the first fall frost is around October 6. That gives Lone Rock an average growing season of about 158 days.
Last spring frost
| Early (10% chance after) | April 12 |
|---|---|
| Average (50%) | May 1 |
| Late (90%) | May 15 |
First fall frost
| Early (10%) | September 22 |
|---|---|
| Average (50%) | October 6 |
| Late (90% chance before) | October 18 |