Danbury, CT 10590 Frost Dates
Danbury, CT: when does the frost end?
The last spring frost here typically falls around 05/01, about 246 days from today. Fall's first freeze usually shows up around 10/14, roughly 166 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 7 weeks until Danbury's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
Danbury against the rest of the dataset
Danbury's growing season runs about 166 days, ranking 30,273 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 355 of 391.
Learn more
Before leaning on 10590's figures: zone vs. frost date explains why Zone 6b and Danbury's frost date answer different questions, while the frost range explains how to read the range around Danbury's dates instead of trusting one.