Frost dates in Rugby, ND
The average last spring frost in Rugby is around May 14 and the first fall frost is around September 21. That gives Rugby an average growing season of about 130 days.
Last spring frost
| Early (10% chance after) | April 30 |
|---|---|
| Average (50%) | May 14 |
| Late (90%) | May 28 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 21 |
| Late (90% chance before) | October 6 |