Vergennes, VT 05770 Frost Dates
Frost dates for Vergennes, VT, ZIP 05770
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/03, about 151 frost-free days later.
Zone 5a (-20 to -15°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 Vergennes, not a forecast for this year.
What to do before the first frost
Zone 5a around Vergennes 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.
How much risk comes with planting early here
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Vergennes compares
Vergennes's growing season runs about 151 days, ranking 35,033 of 40,283 US ZIP codes measured here, longest to shortest. Within VT, it ranks 63 of 330.
Learn more
local microclimates explains what one yard in Vergennes can differ from the 05770 normal, and zone vs. frost date explains why Zone 5a and Vergennes's frost date answer different questions.