Frost dates in Blue Grass, IA
The average last spring frost in Blue Grass is around April 12 and the first fall frost is around October 23. That gives Blue Grass an average growing season of about 194 days.
Last spring frost
| Early (10% chance after) | March 27 |
|---|---|
| Average (50%) | April 12 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | October 6 |
|---|---|
| Average (50%) | October 23 |
| Late (90% chance before) | November 11 |