Frost dates in Mapleton, ND
The average last spring frost in Mapleton is around May 10 and the first fall frost is around October 1. That gives Mapleton an average growing season of about 144 days.
Last spring frost
| Early (10% chance after) | April 22 |
|---|---|
| Average (50%) | May 10 |
| Late (90%) | May 21 |
First fall frost
| Early (10%) | September 15 |
|---|---|
| Average (50%) | October 1 |
| Late (90% chance before) | October 16 |