Marshfield, VT 05647 Frost Dates
05647, near Marshfield, VT: the frost window
Typically, the last spring freeze lands around 05/25, roughly 270 days out. Fall's first freeze usually shows up around 09/22, roughly 119 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Marshfield in Zone 4b (-25 to -20°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
Marshfield's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/07 and only about 1 year in 10 sees frost after that.
Marshfield against the rest of the dataset
At roughly 119 frost-free days, Marshfield places 39,173 of 40,283 ZIP codes in this dataset. Within VT, it ranks 313 of 330.
Learn more
Two guides worth reading on 05647: local microclimates, on what one yard in Marshfield can differ from the 05647 normal, and zone vs. frost date, on why Zone 4b and Marshfield's frost date answer different questions.