Manchester, VT 05251 Frost Dates
Manchester, VT: when does the frost end?
Around 05/16 is the usual last spring frost, about 261 days away. Fall's first freeze usually shows up around 10/02, roughly 140 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 Manchester, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Manchester's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/16 isn't a guarantee
05/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/31 and only about 1 year in 10 sees frost after that.
Manchester against the rest of the dataset
About 140 days separate Manchester's last and first frost, putting it 37,099 of 40,283 ZIP codes nationally. Within VT, it ranks 178 of 330.
Learn more
Before leaning on 05251's figures: the frost range explains how to read the range around Manchester's dates instead of trusting one, while local microclimates explains what one yard in Manchester can differ from the 05251 normal.