South Burlington, VT 05462 Frost Dates
South Burlington, VT: when does the frost end?
Typically, the last spring freeze lands around 04/29, roughly 244 days out. Fall's first freeze usually shows up around 10/15, roughly 169 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts South Burlington in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 7 weeks until South Burlington's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
South Burlington against the rest of the dataset
About 169 days separate South Burlington's last and first frost, putting it 29,341 of 40,283 ZIP codes nationally. Within VT, it ranks 8 of 330.
Learn more
Before leaning on 05462's figures: local microclimates explains what one yard in South Burlington can differ from the 05462 normal, while zone vs. frost date explains why Zone 5a and South Burlington's frost date answer different questions.