Norwich, CT 06474 Frost Dates
Frost dates for Norwich, CT, ZIP 06474
Typically, the last spring freeze lands around 04/14, roughly 229 days out. 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.
The actual range around Norwich's last frost
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
At roughly 192 frost-free days, Norwich places 20,168 of 40,283 ZIP codes in this dataset. Within CT, it ranks 117 of 391.
Learn more
the frost range explains how to read the range around Norwich's dates instead of trusting one, and local microclimates explains what one yard in Norwich can differ from the 06474 normal.