Frost dates in Connecticut
Across 23 NOAA stations in Connecticut, the average last spring frost ranges from April 5 at Bridgeport Sikorsky Mem Airport to May 11 at Falls Village.
| Ansonia 1 Ne | April 25 | October 17 | 175 |
| Bakersville | May 8 | October 5 | 151 |
| Barkhamsted | April 30 | October 17 | 168 |
| Bridgeport Sikorsky Mem Airport | April 5 | November 6 | 216 |
| Burlington | April 25 | October 18 | 172 |
| Danbury | April 20 | October 20 | 181 |
| Danbury Muni Airport | May 1 | October 14 | 166 |
| Falls Village | May 11 | October 4 | 146 |
| Groton | April 8 | November 2 | 207 |
| Groton New London Airport | April 16 | October 28 | 194 |
| Hampton | April 30 | October 15 | 167 |
| Hartford Bradley Intl Airport | April 21 | October 16 | 177 |
| Hartford Brainard Fld | April 17 | October 26 | 191 |
| Meriden Markham Muni Airport | April 26 | October 16 | 175 |
| Mt Carmel | April 18 | October 26 | 191 |
| New Haven Tweed Airport | April 17 | October 27 | 193 |
| Norfolk 2 Sw | May 3 | October 11 | 161 |
| Norwich Public Utility Plt | April 14 | October 24 | 192 |
| Staffordville | May 7 | October 12 | 159 |
| Stamford 5 N | April 17 | October 23 | 188 |
| Storrs | April 19 | October 22 | 186 |
| W Thompson Lake | May 1 | October 9 | 161 |
| Willimantic Windham Airport | April 28 | October 13 | 167 |
Sources
- U.S. Annual/Seasonal Climate Normals, 1991 to 2020 (freeze probability dates by station), NOAA National Centers for Environmental Information, checked 1 November 2026
- Annual/Seasonal Normals 1991 to 2020 documentation, NOAA National Centers for Environmental Information, checked 1 November 2026
- 2024 Gazetteer Files, ZIP Code Tabulation Areas, US Census Bureau, checked 1 November 2026