Frost Dates for 02702 — Assonet, Massachusetts

Half of springs at Taunton Municipal Airport, MA see their last 32°F night by May 2; only one in ten is past it by April 19, and one in ten still has one after May 16. Planting tender crops after May 8 leaves a 30% risk of a frost on them, after May 12 20%, and after May 16 10%. The 14 days between the even-odds date and the one-in-ten date is wider than at 51% of the 71 Massachusetts stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 8 in half of years, as early as September 25 one year in ten, and holds off past October 25 one year in ten. A hard freeze of 28°F follows 14 days later, around October 22; in spring the one-in-ten date for 28°F is May 2, 14 days before the 32°F one. The freeze-free season lasts 158 days in a typical year, shorter than at 80% of the 71 Massachusetts stations; it reaches 179 days one year in ten and falls short of 139 one year in ten. On average 133 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 12 days longer, to about May 14, and return around September 28. Severe cold of 16°F or below comes every winter, usually between December 2 and March 13.

July is the warmest month at Taunton Municipal Airport, MA, averaging 84°F by day and 61°F at night; January is the coldest at 39°F and 19°F. A freezing night is all but certain in every month from October 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 55% of years.

Warmth for growing adds up to 2,744 growing degree days a year (base 50°F), more than at 61% of the 71 Massachusetts stations. 30% of them (833) have built up by the end of June, and July adds the most, 693. Precipitation totals 47.7 inches a year, most in March (5.2") and least in February (3.0"); May to September bring 38% of it.

The nearest other station, Taunton, MA, 7 miles north of Assonet, has a last frost 10 days earlier (April 22), a first frost 11 days later (October 19), a season 21 days longer.

The first measurable snow (0.1 inch or more) in Assonet usually arrives around December 17, and the last of the season around March 15. Those are the middle dates across the winters of 1991–2020 at Taunton, MA, 7.5 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 48 days after the last snow.

ZIP 02702 is 6 miles from Taunton Municipal Airport, MA, which stands at 43 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 02718 (East Taunton). The 2023 USDA Plant Hardiness Zone Map lists ZIP 02702 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.