Litchfield, CT 06759 Frost Dates
Frost dates for Litchfield, CT, ZIP 06759
Around 05/08 is the usual last spring frost, about 253 days away. The first fall frost typically arrives around 10/05, about 151 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 Litchfield, not a forecast for this year.
What to do before the first frost
Zone 6a around Litchfield has about 5 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 05/08 isn't a guarantee
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Litchfield compares
About 151 days separate Litchfield's last and first frost, putting it 35,076 of 40,283 ZIP codes nationally. Within CT, it ranks 384 of 391.
Learn more
zone vs. frost date explains why Zone 6a and Litchfield's frost date answer different questions, and the frost range explains how to read the range around Litchfield's dates instead of trusting one.