Frost dates in South Prairie, WA

The average last spring frost in South Prairie is around April 20 and the first fall frost is around October 23. That gives South Prairie an average growing season of about 186 days.

Last spring frost

Early (10% chance after)March 27
Average (50%)April 20
Late (90%)May 8

First fall frost

Early (10%)October 7
Average (50%)October 23
Late (90% chance before)November 12

See the South Prairie planting calendar →