Frost dates in Upham, ND
The average last spring frost in Upham is around May 18 and the first fall frost is around September 14. That gives Upham an average growing season of about 119 days.
Last spring frost
| Early (10% chance after) | May 8 |
|---|---|
| Average (50%) | May 18 |
| Late (90%) | June 3 |
First fall frost
| Early (10%) | August 30 |
|---|---|
| Average (50%) | September 14 |
| Late (90% chance before) | September 30 |