Vergennes, VT 05487 Frost Dates
Vergennes, VT: when does the frost end?
The last spring frost here typically falls around 05/21, about 266 days from today. 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
About 124 days separate Vergennes's last and first frost, putting it 38,841 of 40,283 ZIP codes nationally. Within VT, it ranks 306 of 330.
Learn more
Before leaning on 05487's figures: local microclimates explains what one yard in Vergennes can differ from the 05487 normal, while zone vs. frost date explains why Zone 5a and Vergennes's frost date answer different questions.