Frost dates in Ursa, IL
The average last spring frost in Ursa is around April 13 and the first fall frost is around October 21. That gives Ursa an average growing season of about 191 days.
Last spring frost
| Early (10% chance after) | March 31 |
|---|---|
| Average (50%) | April 13 |
| Late (90%) | April 24 |
First fall frost
| Early (10%) | October 5 |
|---|---|
| Average (50%) | October 21 |
| Late (90% chance before) | November 5 |