New Britain, CT 06051 Frost Dates
06051, near New Britain, 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 10/26, roughly 191 days after the last spring frost.
New Britain 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
New Britain's growing season runs out in roughly 8 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 New Britain's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 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.
New Britain against the rest of the dataset
New Britain's growing season runs about 191 days, ranking 20,683 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 192 of 391.
Learn more
Two guides worth reading on 06051: zone vs. frost date, on why Zone 6b and New Britain's frost date answer different questions, and the frost range, on how to read the range around New Britain's dates instead of trusting one.