Danbury, CT 06812 Frost Dates
Danbury, CT: when does the frost end?
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 Danbury, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Danbury's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/20 isn't a guarantee
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.
Danbury against the rest of the dataset
At roughly 181 frost-free days, Danbury places 24,433 of 40,283 ZIP codes in this dataset. Within CT, it ranks 244 of 391.
Learn more
Before leaning on 06812's figures: local microclimates explains what one yard in Danbury can differ from the 06812 normal, while zone vs. frost date explains why Zone 6b and Danbury's frost date answer different questions.