Frost dates in New Boston, IL
The average last spring frost in New Boston is around April 14 and the first fall frost is around October 25. That gives New Boston an average growing season of about 194 days.
Last spring frost
| Early (10% chance after) | March 28 |
|---|---|
| Average (50%) | April 14 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | October 9 |
|---|---|
| Average (50%) | October 25 |
| Late (90% chance before) | November 8 |