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.
| Station | Elevation | Last freeze | First freeze | Season, days | Town page |
|---|---|---|---|---|---|
| Ansonia 1 Ne | 136 ft | April 25 | October 17 | 175 | Ansonia |
| Bakersville | 686 ft | May 8 | October 5 | 150 | New Hartford Center |
| Barkhamsted | 710 ft | April 30 | October 17 | 170 | Barkhamsted |
| Bridgeport Sikorsky Mem AP | 5 ft | April 5 | November 6 | 215 | Stratford |
| Burlington | 505 ft | April 25 | October 18 | 176 | Collinsville |
| Danbury | 405 ft | April 20 | October 20 | 183 | Danbury |
| Danbury Muni AP | 457 ft | May 1 | October 14 | 166 | Danbury |
| Falls Village | 550 ft | May 11 | October 4 | 146 | Falls Village |
| Groton | 40 ft | April 8 | November 2 | 208 | Poquonock Bridge |
| Groton New London AP | 10 ft | April 16 | October 28 | 195 | Poquonock Bridge |
| Hampton | 490 ft | April 30 | October 15 | 168 | Brooklyn |
| Hartford Bradley Intl AP | 190 ft | April 21 | October 16 | 178 | Windsor Locks |
| Hartford Brainard Fld | 19 ft | April 17 | October 26 | 192 | Wethersfield |
| Meriden Markham Muni AP | 103 ft | April 26 | October 16 | 173 | Meriden |
| Mt Carmel | 180 ft | April 18 | October 26 | 191 | Hamden |
| New Haven Tweed AP | 3 ft | April 17 | October 27 | 193 | East Haven |
| Norfolk 2 Sw | 1,340 ft | May 3 | October 11 | 161 | Norfolk |
| Norwich Public Utility Plt | 20 ft | April 14 | October 24 | 193 | Norwich |
| Staffordville | 736 ft | May 7 | October 12 | 158 | Stafford |
| Stamford 5 N | 190 ft | April 17 | October 23 | 189 | North Stamford |
| Storrs | 665 ft | April 19 | October 22 | 186 | Storrs |
| W Thompson Lake | 360 ft | May 1 | October 9 | 161 | Putnam |
| Willimantic Windham AP | 247 ft | April 28 | October 13 | 168 | Mansfield Center |
Sources
NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal freeze probabilities. Public domain.