Danielson, CT 06239 Frost Dates
Frost dates for Danielson, CT, ZIP 06239
The last spring frost here typically falls around 05/01, about 246 days from today. The first fall frost typically arrives around 10/09, about 161 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 Danielson, not a forecast for this year.
What to do before the first frost
Zone 6b around Danielson has about 6 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
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Danielson compares
About 161 days separate Danielson's last and first frost, putting it 32,033 of 40,283 ZIP codes nationally. Within CT, it ranks 368 of 391.
Learn more
zone vs. frost date explains why Zone 6b and Danielson's frost date answer different questions, and the frost range explains how to read the range around Danielson's dates instead of trusting one.