Fenwick, CT 06475 Frost Dates
Frost dates for Fenwick, CT, ZIP 06475
Typically, the last spring freeze lands around 04/06, roughly 221 days out. The first fall frost typically arrives around 11/17, about 221 frost-free days later.
The USDA Plant Hardiness Zone Map puts Fenwick in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7a around Fenwick has about 12 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/06 isn't a guarantee
04/06 is the middle of 30 years of NOAA records, not a promise. Plant by 03/25 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fenwick compares
At roughly 221 frost-free days, Fenwick places 12,622 of 40,283 ZIP codes in this dataset. Within CT, it ranks 6 of 391.
Learn more
zone vs. frost date explains why Zone 7a and Fenwick's frost date answer different questions, and the frost range explains how to read the range around Fenwick's dates instead of trusting one.