New Hampshire Frost Dates

Across New Hampshire, the average last spring frost ranges from Apr 29 in Nashua to May 23 in Berlin. Find your town below, or enter your ZIP code for the nearest station.

Largest cities

ManchesterNashuaConcordDoverRochester

Average frost dates in New Hampshire towns

Average (50%) dates of the last 32°F frost in spring and the first in fall, from the nearest NOAA station. Towns with 5,000+ residents.

TownLast frostFirst frostSeason (days)
BerlinMay 23Sep 22122
ClaremontMay 14Oct 1140
ConcordMay 8Oct 3146
DoverMay 3Oct 10158
FranklinMay 7Oct 3148
KeeneMay 14Oct 1138
LaconiaApr 30Oct 18170
LebanonMay 9Oct 6148
ManchesterApr 30Oct 11164
NashuaApr 29Oct 8162
PortsmouthMay 4Oct 8157
RochesterApr 30Oct 9161
SomersworthApr 30Oct 9161