Middletown, CT 06414 Frost Dates
06414, near Middletown, 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.
The USDA Plant Hardiness Zone Map puts Middletown 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
Middletown'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.
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 04/01 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.
Middletown against the rest of the dataset
About 191 days separate Middletown's last and first frost, putting it 20,689 of 40,283 ZIP codes nationally. Within CT, it ranks 198 of 391.
Learn more
Two guides worth reading on 06414: zone vs. frost date, on why Zone 6b and Middletown's frost date answer different questions, and the frost range, on how to read the range around Middletown's dates instead of trusting one.