Bridgeport, CT 06404 Frost Dates
06404, near Bridgeport, CT: the frost window
Around 04/05 is the usual last spring frost, about 220 days away. Fall's first freeze usually shows up around 11/06, roughly 216 days after the last spring frost.
Bridgeport sits in USDA Zone 6b (-5 to 0°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
Bridgeport's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/05 isn't a guarantee
04/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/17 and only about 1 year in 10 sees frost after that.
Bridgeport against the rest of the dataset
Bridgeport's growing season runs about 216 days, ranking 13,684 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 8 of 391.
Learn more
Two guides worth reading on 06404: local microclimates, on what one yard in Bridgeport can differ from the 06404 normal, and zone vs. frost date, on why Zone 6b and Bridgeport's frost date answer different questions.