Frost dates in O'Neill, NE
The average last spring frost in O'Neill is around May 7 and the first fall frost is around October 3. That gives O'Neill an average growing season of about 149 days.
Last spring frost
| Early (10% chance after) | April 17 |
|---|---|
| Average (50%) | May 7 |
| Late (90%) | May 22 |
First fall frost
| Early (10%) | September 16 |
|---|---|
| Average (50%) | October 3 |
| Late (90% chance before) | October 19 |