Vergennes, VT 05778 Frost Dates
Frost dates for Vergennes, VT, ZIP 05778
Around 05/05 is the usual last spring frost, about 250 days away. The first fall frost typically arrives around 10/03, about 151 frost-free days later.
The USDA Plant Hardiness Zone Map puts Vergennes in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
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.
The actual range around Vergennes's last frost
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 35,034 of 40,283 US ZIP codes measured here, longest to shortest. Within VT, it ranks 64 of 330.
Learn more
zone vs. frost date explains why Zone 5a and Vergennes's frost date answer different questions, and the frost range explains how to read the range around Vergennes's dates instead of trusting one.