West Haven, CT 06516 Frost Dates
06516, near West Haven, CT: the frost window
Around 04/17 is the usual last spring frost, about 232 days away. Fall's first freeze usually shows up around 10/27, roughly 193 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for West Haven, not a forecast for this year.
Stretching the season past the first frost
West Haven'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.
The actual range around West Haven's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
West Haven against the rest of the dataset
At roughly 193 frost-free days, West Haven places 19,727 of 40,283 ZIP codes in this dataset. Within CT, it ranks 100 of 391.
Learn more
Two guides worth reading on 06516: local microclimates, on what one yard in West Haven can differ from the 06516 normal, and zone vs. frost date, on why Zone 7a and West Haven's frost date answer different questions.