Frost Dates for 02346 — Middleboro, Massachusetts

Half of springs at Middleboro, MA see their last 32°F night by April 23; only one in ten is past it by April 12, and one in ten still has one after May 6. Planting tender crops after April 29 leaves a 30% risk of a frost on them, after May 1 20%, and after May 6 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 51% of the 71 Massachusetts stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 16 in half of years, as early as October 3 one year in ten, and holds off past October 30 one year in ten. A hard freeze of 28°F follows 11 days later, around October 27; in spring the one-in-ten date for 28°F is April 21, 15 days before the 32°F one. The freeze-free season lasts 174 days in a typical year, longer than at 58% of the 71 Massachusetts stations; it reaches 192 days one year in ten and falls short of 155 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 6, and return around October 5. Severe cold of 16°F or below comes every winter, usually between December 2 and March 14.

July is the warmest month at Middleboro, MA, averaging 82°F by day and 61°F at night; January is the coldest at 38°F and 17°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 24% of years.

Warmth for growing adds up to 2,589 growing degree days a year (base 50°F), fewer than at 59% of the 71 Massachusetts stations. 29% of them (748) have built up by the end of June, and July adds the most, 671. Precipitation totals 52.5 inches a year, most in March (5.8") and least in July (3.3"); May to September bring 36% of it.

The nearest other station, Bridgewater, MA, 6 miles northwest of Middleboro, has a last frost 8 days later (May 1), a first frost 7 days earlier (October 9), a season 13 days shorter.

The first measurable snow (0.1 inch or more) in Middleboro usually arrives around December 7, and the last of the season around March 21. Those are the middle dates across the winters of 1991–2020 at Middleboro, MA, 0.9 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 33 days after the last snow.

ZIP 02346 is under a mile from Middleboro, MA, which stands at 45 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 02346 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.