Vergennes, VT 05469 Frost Dates
Vergennes, VT: when does the frost end?
Typically, the last spring freeze lands around 05/21, roughly 266 days out. Fall's first freeze usually shows up around 09/25, roughly 124 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 4 weeks until Vergennes's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/21 isn't a guarantee
05/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Vergennes against the rest of the dataset
At roughly 124 frost-free days, Vergennes places 38,839 of 40,283 ZIP codes in this dataset. Within VT, it ranks 304 of 330.
Learn more
Before leaning on 05469's figures: local microclimates explains what one yard in Vergennes can differ from the 05469 normal, while zone vs. frost date explains why Zone 5a and Vergennes's frost date answer different questions.