Stamford, CT 06870 Frost Dates
When can you plant in Stamford, CT?
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 10/23, about 188 frost-free days later.
The USDA Plant Hardiness Zone Map puts Stamford in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 8 weeks of growing season left in Stamford before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Stamford compares
About 188 days separate Stamford's last and first frost, putting it 21,794 of 40,283 ZIP codes nationally. Within CT, it ranks 207 of 391.
Learn more
the frost range covers how to read the range around Stamford's dates instead of trusting one. local microclimates covers what one yard in Stamford can differ from the 06870 normal.