Newton, MA 02090 Frost Dates
Frost dates for Newton, MA, ZIP 02090
Around 04/25 is the usual last spring frost, about 240 days away. The first fall frost typically arrives around 10/09, about 167 frost-free days later.
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 Newton, not a forecast for this year.
What to do before the first frost
Zone 6b around Newton has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Newton's last frost
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Newton compares
Newton's growing season runs about 167 days, ranking 29,839 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 395 of 712.
Learn more
zone vs. frost date explains why Zone 6b and Newton's frost date answer different questions, and the frost range explains how to read the range around Newton's dates instead of trusting one.