Stamford, CT 06903 Frost Dates
06903, near Stamford, CT: the frost window
The last spring frost here typically falls around 04/17, about 232 days from today. Fall's first freeze usually shows up around 10/23, roughly 188 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Stamford in Zone 7a (0 to 5°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
Stamford's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Stamford against the rest of the dataset
At roughly 188 frost-free days, Stamford places 21,799 of 40,283 ZIP codes in this dataset. Within CT, it ranks 212 of 391.
Learn more
Two guides worth reading on 06903: local microclimates, on what one yard in Stamford can differ from the 06903 normal, and zone vs. frost date, on why Zone 7a and Stamford's frost date answer different questions.