Frost dates in Belknap, IL
The average last spring frost in Belknap is around March 26 and the first fall frost is around November 3. That gives Belknap an average growing season of about 222 days.
Last spring frost
| Early (10% chance after) | March 7 |
|---|---|
| Average (50%) | March 26 |
| Late (90%) | April 20 |
First fall frost
| Early (10%) | October 20 |
|---|---|
| Average (50%) | November 3 |
| Late (90% chance before) | November 16 |