Frost dates in St. John, ND

The average last spring frost in St. John is around May 20 and the first fall frost is around September 22. That gives St. John an average growing season of about 125 days.

Last spring frost

Early (10% chance after)May 8
Average (50%)May 20
Late (90%)June 3

First fall frost

Early (10%)September 10
Average (50%)September 22
Late (90% chance before)October 5

See the St. John planting calendar →