West Haven, CT 06477 Frost Dates
West Haven, CT: when does the frost end?
The last spring frost here typically falls around 04/17, about 232 days from today. Fall's first freeze usually shows up around 10/27, roughly 193 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts West Haven in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 9 weeks until West Haven's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/17 isn't a guarantee
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 19,726 of 40,283 ZIP codes in this dataset. Within CT, it ranks 99 of 391.
Learn more
Before leaning on 06477's figures: the frost range explains how to read the range around West Haven's dates instead of trusting one, while local microclimates explains what one yard in West Haven can differ from the 06477 normal.