Norwich, CT 06249 Frost Dates
When can you plant in Norwich, CT?
The last spring frost here typically falls around 04/28, about 243 days from today. The first fall frost typically arrives around 10/13, about 167 frost-free days later.
Norwich sits in USDA Zone 6b (-5 to 0°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 7 weeks of growing season left in Norwich before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/28 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Norwich compares
Norwich's growing season runs about 167 days, ranking 29,870 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 342 of 391.
Learn more
local microclimates covers what one yard in Norwich can differ from the 06249 normal. zone vs. frost date covers why Zone 6b and Norwich's frost date answer different questions.