Frost Dates for 02072 — Stoughton, Massachusetts

Half of springs at Norwood Mem Airport, MA see their last 32°F night by April 25; only one in ten is past it by April 9, and one in ten still has one after May 11. Planting tender crops after May 2 leaves a 30% risk of a frost on them, after May 6 20%, and after May 11 10%. The 16 days between the even-odds date and the one-in-ten date is wider than at 87% of the 71 Massachusetts stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 9 in half of years, as early as September 28 one year in ten, and holds off past October 30 one year in ten. A hard freeze of 28°F follows 14 days later, around October 23; in spring the one-in-ten date for 28°F is April 27, 14 days before the 32°F one. The freeze-free season lasts 167 days in a typical year, shorter than at 55% of the 71 Massachusetts stations; it reaches 191 days one year in ten and falls short of 145 one year in ten. On average 139 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 13 days longer, to about May 8, and return around September 30. Severe cold of 16°F or below comes every winter, usually between December 6 and March 8.

July is the warmest month at Norwood Mem Airport, MA, averaging 86°F by day and 63°F at night; January is the coldest at 40°F and 21°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 34% of years.

Warmth for growing adds up to 3,088 growing degree days a year (base 50°F), more than at 94% of the 71 Massachusetts stations. 32% of them (993) have built up by the end of June, and July adds the most, 752. Precipitation totals 43.8 inches a year, most in October (4.5") and least in February (2.8"); May to September bring 40% of it.

The nearest other station, Blue Hill Coop, MA, 6 miles north of Stoughton and 575 feet higher, has a last frost 7 days earlier (April 18), a first frost 17 days later (October 26), a season 23 days longer.

The first measurable snow (0.1 inch or more) in Stoughton usually arrives around November 14, and the last of the season around April 6. Those are the middle dates across the winters of 1991–2020 at Blue Hill Coop, MA, 6 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 19 days after the last snow.

ZIP 02072 is 6 miles from Norwood Mem Airport, MA, which stands at 50 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 02062 (Norwood). The 2023 USDA Plant Hardiness Zone Map lists ZIP 02072 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.