Frost dates · New Hampshire
New Hampshire counties by frost timing.
Latest at top, earliest at bottom. In most states this matches the north-to-south gradient.
MapList
Sorted by spring frost
Latest → earliest.
Coos County
Spring May 17·Fall Sep 30136-day season
Carroll County
Spring May 4·Fall Oct 4153-day season
Cheshire County
Spring May 2·Fall Oct 10161-day season
Sullivan County
Spring May 1·Fall Oct 11163-day season
Grafton County
Spring Apr 30·Fall Oct 20173-day season
Merrimack County
Spring Apr 30·Fall Oct 9162-day season
Rockingham County
Spring Apr 24·Fall Oct 15174-day season
Hillsborough County
Spring Apr 20·Fall Oct 16179-day season
Belknap County
Spring Apr 17·Fall Nov 1198-day season
Strafford County
Spring Apr 17·Fall Oct 23189-day season