Hartford, CT 06134 Frost Dates
Hartford, CT: when does the frost end?
Typically, the last spring freeze lands around 04/17, roughly 232 days out. Fall's first freeze usually shows up around 10/26, roughly 191 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hartford 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 Hartford's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/17 isn't a guarantee
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
Hartford against the rest of the dataset
At roughly 191 frost-free days, Hartford places 20,654 of 40,283 ZIP codes in this dataset. Within CT, it ranks 166 of 391.
Learn more
Before leaning on 06134'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 06134 normal.