Frost dates in Martinsburg, IA

The average last spring frost in Martinsburg is around April 23 and the first fall frost is around October 12. That gives Martinsburg an average growing season of about 172 days.

Last spring frost

Early (10% chance after)April 8
Average (50%)April 23
Late (90%)May 7

First fall frost

Early (10%)September 27
Average (50%)October 12
Late (90% chance before)October 29

See the Martinsburg planting calendar →