Newtown, CT 06881 Frost Dates
When can you plant in Newtown, CT?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. 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
About 8 weeks of growing season left in Newtown 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
04/20 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 24,590 of 40,283 ZIP codes in this dataset. Within CT, it ranks 265 of 391.
Learn more
local microclimates covers what one yard in Newtown can differ from the 06881 normal. zone vs. frost date covers why Zone 7a and Newtown's frost date answer different questions.