Hartford, CT 06141 Frost Dates
Hartford, CT: when does the frost end?
The last spring frost here typically falls around 04/17, about 232 days from today. 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.
The actual range around Hartford's last frost
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
Hartford's growing season runs about 191 days, ranking 20,658 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 170 of 391.
Learn more
Before leaning on 06141's figures: local microclimates explains what one yard in Hartford can differ from the 06141 normal, while zone vs. frost date explains why Zone 6b and Hartford's frost date answer different questions.