Frost Dates for 02559 — Pocasset, Massachusetts

Half of springs at E Wareham, MA see their last 32°F night by April 21; only one in ten is past it by April 7, and one in ten still has one after May 3. Planting tender crops after April 26 leaves a 30% risk of a frost on them, after April 30 20%, and after May 3 10%. The 12 days between the even-odds date and the one-in-ten date is narrower than at 83% of the 71 Massachusetts stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 24 in half of years, as early as October 11 one year in ten, and holds off past November 7 one year in ten. A hard freeze of 28°F follows 11 days later, around November 4; in spring the one-in-ten date for 28°F is April 21, 12 days before the 32°F one. The freeze-free season lasts 186 days in a typical year, longer than at 80% of the 71 Massachusetts stations; it reaches 203 days one year in ten and falls short of 168 one year in ten. On average 116 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 11 days longer, to about May 2, and return around October 14. Severe cold of 16°F or below comes every winter, usually between December 12 and March 6.

July is the warmest month at E Wareham, MA, averaging 81°F by day and 64°F at night; January is the coldest at 39°F and 22°F. A freezing night is all but certain in every month from November 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 17% of years.

Warmth for growing adds up to 2,713 growing degree days a year (base 50°F), more than at 56% of the 71 Massachusetts stations. 27% of them (737) have built up by the end of June, and July adds the most, 697. Precipitation totals 51.3 inches a year, most in March (5.6") and least in July (3.1"); May to September bring 36% of it.

The nearest other station, E Sandwich, MA, 8 miles east of Pocasset, has a last frost 5 days later (April 26), a first frost 2 days later (October 26), a season 6 days shorter.

The first measurable snow (0.1 inch or more) in Pocasset usually arrives around December 9, and the last of the season around March 20. Those are the middle dates across the winters of 1991–2020 at E Wareham, MA, 5.6 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 32 days after the last snow.

ZIP 02559 is 6 miles from E Wareham, MA, which stands at 30 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 5 other ZIP codes share the station; its figures are presented in full for 02532 (Bourne). The 2023 USDA Plant Hardiness Zone Map lists ZIP 02559 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.