Frost dates in New London County, Connecticut
The average last spring frost in New London County falls Apr 8 to Apr 30 and the average first fall frost Oct 13 to Nov 2, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 6b to 7a. Places: Baltic, Colchester, Conning Towers-Nautilus Park, Gales Ferry, Jewett City, Mashantucket. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 06249 | Apr 28 | Oct 13 | 6b | |
| 06254 | Apr 14 | Oct 24 | 6b | |
| 06320 | New London | Apr 16 | Oct 28 | 7a |
| 06330 | Baltic | Apr 14 | Oct 24 | 6b |
| 06333 | Apr 16 | Oct 28 | 7a | |
| 06334 | Apr 14 | Oct 24 | 6b | |
| 06335 | Gales Ferry | Apr 8 | Nov 2 | 7a |
| 06336 | Apr 14 | Oct 24 | 6b | |
| 06338 | Mashantucket | Apr 14 | Oct 24 | 6b |
| 06339 | Apr 8 | Nov 2 | 6b | |
| 06340 | Conning Towers-Nautilus Park | Apr 8 | Nov 2 | 7a |
| 06350 | Apr 30 | Oct 15 | 6b | |
| 06351 | Jewett City | Apr 14 | Oct 24 | 6b |
| 06353 | Oxoboxo River | Apr 14 | Oct 24 | 6b |
| 06355 | Old Mystic | Apr 8 | Nov 2 | 7a |
| 06357 | Niantic | Apr 16 | Oct 28 | 7a |
| 06359 | Apr 11 | Oct 31 | 6b | |
| 06360 | Norwich | Apr 14 | Oct 24 | 6b |
| 06365 | Apr 14 | Oct 24 | 6b | |
| 06370 | Apr 14 | Oct 24 | 6b | |
| 06371 | Apr 16 | Oct 28 | 7a | |
| 06375 | Apr 8 | Nov 2 | 7a | |
| 06376 | Apr 16 | Oct 28 | 7a | |
| 06378 | Stonington | Apr 11 | Oct 31 | 7a |
| 06379 | Pawcatuck | Apr 11 | Oct 31 | 7a |
| 06380 | Norwich | Apr 14 | Oct 24 | 6b |
| 06382 | Oxoboxo River | Apr 14 | Oct 24 | 6b |
| 06384 | Apr 14 | Oct 24 | 6b | |
| 06385 | Waterford | Apr 16 | Oct 28 | 7a |
| 06389 | Norwich | Apr 14 | Oct 24 | 6b |
| 06415 | Colchester | Apr 14 | Oct 24 | 6b |
| 06420 | Apr 14 | Oct 24 | 6b | |
| 06439 | Apr 14 | Oct 24 | 6b |
Nearby counties
Middlesex County Windham County Tolland County Hartford County New Haven County Litchfield County
All Connecticut counties · Download Connecticut frost dates (CSV)
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