Frost dates in Castle Valley, UT
The average last spring frost in Castle Valley is around April 19 and the first fall frost is around October 25. That gives Castle Valley an average growing season of about 189 days.
Last spring frost
| Early (10% chance after) | April 13 |
|---|---|
| Average (50%) | April 19 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | October 15 |
|---|---|
| Average (50%) | October 25 |
| Late (90% chance before) | November 6 |