Middletown, CT 06457 Frost Dates
When can you plant in Middletown, CT?
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/16, about 175 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 Middletown, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Middletown before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Middletown compares
At roughly 175 frost-free days, Middletown places 26,737 of 40,283 ZIP codes in this dataset. Within CT, it ranks 307 of 391.
Learn more
local microclimates covers what one yard in Middletown can differ from the 06457 normal. zone vs. frost date covers why Zone 6b and Middletown's frost date answer different questions.