Montpelier, VT 05620 Frost Dates
Frost dates for Montpelier, VT, ZIP 05620
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/09, about 157 frost-free days later.
Montpelier sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 4b around Montpelier 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
05/05 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. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Montpelier compares
Montpelier's growing season runs about 157 days, ranking 33,291 of 40,283 US ZIP codes measured here, longest to shortest. Within VT, it ranks 47 of 330.
Learn more
zone vs. frost date explains why Zone 4b and Montpelier's frost date answer different questions, and the frost range explains how to read the range around Montpelier's dates instead of trusting one.