Stamford, CT 06910 Frost Dates
06910, near Stamford, CT: the frost window
Around 04/17 is the usual last spring frost, about 232 days away. Fall's first freeze usually shows up around 10/23, roughly 188 days after the last spring frost.
Zone 7a (0 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 Stamford, not a forecast for this year.
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.
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 04/03 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
About 188 days separate Stamford's last and first frost, putting it 21,803 of 40,283 ZIP codes nationally. Within CT, it ranks 216 of 391.
Learn more
Two guides worth reading on 06910: zone vs. frost date, on why Zone 7a and Stamford's frost date answer different questions, and the frost range, on how to read the range around Stamford's dates instead of trusting one.