Norwich, CT 06360 Frost Dates
Frost dates for Norwich, CT, ZIP 06360
The last spring frost here typically falls around 04/14, about 229 days from today. The first fall frost typically arrives around 10/24, about 192 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 Norwich, not a forecast for this year.
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 20,161 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 110 of 391.
Learn more
zone vs. frost date explains why Zone 6b and Norwich's frost date answer different questions, and the frost range explains how to read the range around Norwich's dates instead of trusting one.