Danbury, CT 06801 Frost Dates
Danbury, CT: when does the frost end?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. Fall's first freeze usually shows up around 10/20, roughly 181 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Danbury 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
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.
How much risk comes with planting early here
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
Danbury's growing season runs about 181 days, ranking 24,430 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 241 of 391.
Learn more
Before leaning on 06801's figures: the frost range explains how to read the range around Danbury's dates instead of trusting one, while local microclimates explains what one yard in Danbury can differ from the 06801 normal.