Connecticut climate

Connecticut Frost Dates

The median last spring freeze and first fall freeze (32°F) at 23 NOAA stations in Connecticut, 1991-2020, with the growing season between them.

Every station

A median date has an even chance of a later freeze in spring or an earlier one in fall. Each town page gives the dates at 36, 32 and 28°F and every probability from 10 to 90 percent.

StationElevationLast freezeFirst freezeSeason, daysTown page
Ansonia 1 Ne136 ftApril 25October 17175Ansonia
Bakersville686 ftMay 8October 5150New Hartford Center
Barkhamsted710 ftApril 30October 17170Barkhamsted
Bridgeport Sikorsky Mem AP5 ftApril 5November 6215Stratford
Burlington505 ftApril 25October 18176Collinsville
Danbury405 ftApril 20October 20183Danbury
Danbury Muni AP457 ftMay 1October 14166Danbury
Falls Village550 ftMay 11October 4146Falls Village
Groton40 ftApril 8November 2208Poquonock Bridge
Groton New London AP10 ftApril 16October 28195Poquonock Bridge
Hampton490 ftApril 30October 15168Brooklyn
Hartford Bradley Intl AP190 ftApril 21October 16178Windsor Locks
Hartford Brainard Fld19 ftApril 17October 26192Wethersfield
Meriden Markham Muni AP103 ftApril 26October 16173Meriden
Mt Carmel180 ftApril 18October 26191Hamden
New Haven Tweed AP3 ftApril 17October 27193East Haven
Norfolk 2 Sw1,340 ftMay 3October 11161Norfolk
Norwich Public Utility Plt20 ftApril 14October 24193Norwich
Staffordville736 ftMay 7October 12158Stafford
Stamford 5 N190 ftApril 17October 23189North Stamford
Storrs665 ftApril 19October 22186Storrs
W Thompson Lake360 ftMay 1October 9161Putnam
Willimantic Windham AP247 ftApril 28October 13168Mansfield Center

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal freeze probabilities. Public domain.