Ansonia, CT 06483 Frost Dates
06483, near Ansonia, CT: the frost window
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 Ansonia in Zone 6b (-5 to 0°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
Ansonia'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.
How much risk comes with planting early here
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.
Ansonia against the rest of the dataset
At roughly 193 frost-free days, Ansonia places 19,746 of 40,283 ZIP codes in this dataset. Within CT, it ranks 102 of 391.
Learn more
Two guides worth reading on 06483: local microclimates, on what one yard in Ansonia can differ from the 06483 normal, and zone vs. frost date, on why Zone 6b and Ansonia's frost date answer different questions.