Waterbury, CT 06779 Frost Dates
06779, near Waterbury, CT: the frost window
Around 04/26 is the usual last spring frost, about 241 days away. Fall's first freeze usually shows up around 10/16, roughly 175 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Waterbury 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
Waterbury's growing season runs out in roughly 7 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
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Waterbury against the rest of the dataset
At roughly 175 frost-free days, Waterbury places 26,711 of 40,283 ZIP codes in this dataset. Within CT, it ranks 291 of 391.
Learn more
Two guides worth reading on 06779: the frost range, on how to read the range around Waterbury's dates instead of trusting one, and local microclimates, on what one yard in Waterbury can differ from the 06779 normal.