Marshfield, VT 05658 Frost Dates
05658, 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.
Marshfield sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a 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
Marshfield's growing season runs about 119 days, ranking 39,174 of 40,283 US ZIP codes measured here, longest to shortest. Within VT, it ranks 314 of 330.
Learn more
Two guides worth reading on 05658: the frost range, on how to read the range around Marshfield's dates instead of trusting one, and local microclimates, on what one yard in Marshfield can differ from the 05658 normal.