Newtown, CT 06911 Frost Dates
Frost dates for Newtown, CT, ZIP 06911
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.
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 Newtown, not a forecast for this year.
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.
How much risk comes with planting early here
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
About 181 days separate Newtown's last and first frost, putting it 24,593 of 40,283 ZIP codes nationally. Within CT, it ranks 268 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.