Springfield, MA 01115 Frost Dates
01115, near Springfield, MA: the frost window
Typically, the last spring freeze lands around 05/03, roughly 248 days out. Fall's first freeze usually shows up around 10/08, roughly 158 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Springfield in Zone 6b (-5 to 0°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
Springfield's growing season runs out in roughly 6 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
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Springfield against the rest of the dataset
Springfield's growing season runs about 158 days, ranking 32,855 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 544 of 712.
Learn more
Two guides worth reading on 01115: local microclimates, on what one yard in Springfield can differ from the 01115 normal, and zone vs. frost date, on why Zone 6b and Springfield's frost date answer different questions.