Lawrence, MA 01845 Frost Dates
01845, near Lawrence, MA: the frost window
Typically, the last spring freeze lands around 04/21, roughly 236 days out. Fall's first freeze usually shows up around 10/21, roughly 182 days after the last spring frost.
Zone 6b (-5 to 0°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 Lawrence, not a forecast for this year.
Stretching the season past the first frost
Lawrence's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Lawrence's last frost
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
Lawrence against the rest of the dataset
About 182 days separate Lawrence's last and first frost, putting it 24,062 of 40,283 ZIP codes nationally. Within MA, it ranks 197 of 712.
Learn more
Two guides worth reading on 01845: the frost range, on how to read the range around Lawrence's dates instead of trusting one, and local microclimates, on what one yard in Lawrence can differ from the 01845 normal.