Frost dates in Roy, UT
The average last spring frost in Roy is around April 19 and the first fall frost is around October 24. That gives Roy an average growing season of about 188 days.
Last spring frost
| Early (10% chance after) | April 10 |
|---|---|
| Average (50%) | April 19 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | October 3 |
|---|---|
| Average (50%) | October 24 |
| Late (90% chance before) | November 8 |