Newtown, CT 06470 Frost Dates
When can you plant in Newtown, CT?
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 6b (-5 to 0°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.
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
At roughly 181 frost-free days, Newtown places 24,574 of 40,283 ZIP codes in this dataset. Within CT, it ranks 249 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 06470 normal.