Frost dates in Springbrook, IA
The average last spring frost in Springbrook is around April 30 and the first fall frost is around October 8. That gives Springbrook an average growing season of about 161 days.
Last spring frost
| Early (10% chance after) | April 16 |
|---|---|
| Average (50%) | April 30 |
| Late (90%) | May 14 |
First fall frost
| Early (10%) | September 24 |
|---|---|
| Average (50%) | October 8 |
| Late (90% chance before) | October 23 |