Middletown, CT 06073 Frost Dates
Frost dates for Middletown, CT, ZIP 06073
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 10/26, about 191 frost-free days later.
Middletown 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
Zone 6b around Middletown 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
04/17 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. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Middletown compares
Middletown's growing season runs about 191 days, ranking 20,688 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 197 of 391.
Learn more
local microclimates explains what one yard in Middletown can differ from the 06073 normal, and zone vs. frost date explains why Zone 6b and Middletown's frost date answer different questions.