Morrisville, VT 05661 Frost Dates
Frost dates for Morrisville, VT, ZIP 05661
Around 05/20 is the usual last spring frost, about 265 days away. The first fall frost typically arrives around 09/28, about 129 frost-free days later.
The USDA Plant Hardiness Zone Map puts Morrisville in Zone 4b (-25 to -20°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 4b around Morrisville has about 4 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 05/20 isn't a guarantee
05/20 is the middle of 30 years of NOAA records, not a promise. Plant by 05/06 and you're betting against frost in roughly 9 years out of 10. 06/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Morrisville compares
About 129 days separate Morrisville's last and first frost, putting it 38,465 of 40,283 ZIP codes nationally. Within VT, it ranks 287 of 330.
Learn more
the frost range explains how to read the range around Morrisville's dates instead of trusting one, and local microclimates explains what one yard in Morrisville can differ from the 05661 normal.