Frost dates in Sentinel Butte, ND
The average last spring frost in Sentinel Butte is around May 18 and the first fall frost is around September 19. That gives Sentinel Butte an average growing season of about 124 days.
Last spring frost
| Early (10% chance after) | May 4 |
|---|---|
| Average (50%) | May 18 |
| Late (90%) | June 7 |
First fall frost
| Early (10%) | September 4 |
|---|---|
| Average (50%) | September 19 |
| Late (90% chance before) | October 3 |