Marshfield, VT 05650 Frost Dates
05650, near Marshfield, VT: the frost window
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/05, roughly 153 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 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/04 isn't a guarantee
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Marshfield against the rest of the dataset
Marshfield's growing season runs about 153 days, ranking 34,633 of 40,283 US ZIP codes measured here, longest to shortest. Within VT, it ranks 54 of 330.
Learn more
Two guides worth reading on 05650: zone vs. frost date, on why Zone 4b and Marshfield's frost date answer different questions, and the frost range, on how to read the range around Marshfield's dates instead of trusting one.