Newtown, CT 06601 Frost Dates
Frost dates for Newtown, CT, ZIP 06601
The last spring frost here typically falls around 04/20, about 235 days from today. The first fall frost typically arrives around 10/20, about 181 frost-free days later.
Newtown sits in USDA Zone 7a (0 to 5°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 7a around Newtown has about 8 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.
The actual range around Newtown's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Newtown compares
At roughly 181 frost-free days, Newtown places 24,577 of 40,283 ZIP codes in this dataset. Within CT, it ranks 252 of 391.
Learn more
zone vs. frost date explains why Zone 7a and Newtown's frost date answer different questions, and the frost range explains how to read the range around Newtown's dates instead of trusting one.