Norwich, CT 06254 Frost Dates
Frost dates for Norwich, CT, ZIP 06254
Around 04/14 is the usual last spring frost, about 229 days away. The first fall frost typically arrives around 10/24, about 192 frost-free days later.
The USDA Plant Hardiness Zone Map puts Norwich in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6b around Norwich 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
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Norwich compares
Norwich's growing season runs about 192 days, ranking 20,157 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 106 of 391.
Learn more
local microclimates explains what one yard in Norwich can differ from the 06254 normal, and zone vs. frost date explains why Zone 6b and Norwich's frost date answer different questions.