Naugatuck, CT 06478 Frost Dates
06478, near Naugatuck, CT: the frost window
Around 04/20 is the usual last spring frost, about 235 days away. Fall's first freeze usually shows up around 10/20, roughly 181 days after the last spring frost.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Naugatuck, not a forecast for this year.
Stretching the season past the first frost
Naugatuck'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 Naugatuck's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Naugatuck against the rest of the dataset
About 181 days separate Naugatuck's last and first frost, putting it 24,446 of 40,283 ZIP codes nationally. Within CT, it ranks 247 of 391.
Learn more
Two guides worth reading on 06478: local microclimates, on what one yard in Naugatuck can differ from the 06478 normal, and zone vs. frost date, on why Zone 6b and Naugatuck's frost date answer different questions.