Newton, MA 02494 Frost Dates
Frost dates for Newton, MA, ZIP 02494
Around 04/19 is the usual last spring frost, about 234 days away. The first fall frost typically arrives around 10/23, about 185 frost-free days later.
The USDA Plant Hardiness Zone Map puts Newton in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6b around Newton has about 8 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.
Why 04/19 isn't a guarantee
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Newton compares
About 185 days separate Newton's last and first frost, putting it 23,044 of 40,283 ZIP codes nationally. Within MA, it ranks 191 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.