Hartford, CT 06075 Frost Dates
Hartford, CT: when does the frost end?
Around 04/19 is the usual last spring frost, about 234 days away. Fall's first freeze usually shows up around 10/22, roughly 186 days after the last spring frost.
Zone 6a (-10 to -5°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 Hartford, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Hartford'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
04/19 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 05/03 and only about 1 year in 10 sees frost after that.
Hartford against the rest of the dataset
Hartford's growing season runs about 186 days, ranking 22,675 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 231 of 391.
Learn more
Before leaning on 06075's figures: the frost range explains how to read the range around Hartford's dates instead of trusting one, while local microclimates explains what one yard in Hartford can differ from the 06075 normal.