Waterbury, CT 06710 Frost Dates
Frost dates for Waterbury, CT, ZIP 06710
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/16, about 175 frost-free days later.
Waterbury sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 6b around Waterbury has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Waterbury compares
Waterbury's growing season runs about 175 days, ranking 26,708 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 288 of 391.
Learn more
the frost range explains how to read the range around Waterbury's dates instead of trusting one, and local microclimates explains what one yard in Waterbury can differ from the 06710 normal.