Bristol, CT 06022 Frost Dates
Frost dates for Bristol, CT, ZIP 06022
The last spring frost here typically falls around 04/25, about 240 days from today. The first fall frost typically arrives around 10/18, about 172 frost-free days later.
Zone 6a (-10 to -5°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 Bristol, not a forecast for this year.
What to do before the first frost
Zone 6a around Bristol has about 7 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.
Why 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bristol compares
Bristol's growing season runs about 172 days, ranking 28,148 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 325 of 391.
Learn more
local microclimates explains what one yard in Bristol can differ from the 06022 normal, and zone vs. frost date explains why Zone 6a and Bristol's frost date answer different questions.