Newtown, CT 06904 Frost Dates
When can you plant in Newtown, CT?
Around 04/20 is the usual last spring frost, about 235 days away. 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
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.
Why 04/20 isn't a guarantee
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
Newtown's growing season runs about 181 days, ranking 24,592 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 267 of 391.
Learn more
the frost range covers how to read the range around Newtown's dates instead of trusting one. local microclimates covers what one yard in Newtown can differ from the 06904 normal.