Fenwick, CT 06371 Frost Dates
06371, near Fenwick, CT: the frost window
Around 04/16 is the usual last spring frost, about 231 days away. Fall's first freeze usually shows up around 10/28, roughly 194 days after the last spring frost.
Fenwick sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Fenwick's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Fenwick against the rest of the dataset
Fenwick's growing season runs about 194 days, ranking 19,663 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 50 of 391.
Learn more
Two guides worth reading on 06371: the frost range, on how to read the range around Fenwick's dates instead of trusting one, and local microclimates, on what one yard in Fenwick can differ from the 06371 normal.