Frost Dates for 27892 — Williamston, North Carolina

Half of springs at Williamston 1 E, NC see their last 32°F night by March 20; only one in ten is past it by March 1, and one in ten still has one after April 5. Planting tender crops after March 28 leaves a 30% risk of a frost on them, after March 31 20%, and after April 5 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 35% of the 173 North Carolina stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 12 in half of years, as early as October 31 one year in ten, and holds off past December 4 one year in ten. A hard freeze of 28°F follows 14 days later, around November 26; in spring the one-in-ten date for 28°F is March 25, 11 days before the 32°F one. The freeze-free season lasts 239 days in a typical year, longer than at 92% of the 173 North Carolina stations; it reaches 268 days one year in ten and falls short of 215 one year in ten. On average 53 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 April 2, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 98% of winters and 16°F in 45%.

July is the warmest month at Williamston 1 E, NC, averaging 89°F by day and 71°F at night; January is the coldest at 52°F and 33°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 88% of years and April still brings one in 20% of years.

Warmth for growing adds up to 5,048 growing degree days a year (base 50°F), more than at 73% of the 173 North Carolina stations. 38% of them (1,939) have built up by the end of June, and July adds the most, 928. Precipitation totals 53.2 inches a year, most in September (6.9") and least in February (3.2"); May to September bring 51% of it.

The nearest other station, Washington Wwtp 4W, NC, 19 miles south of Williamston, has a last frost 2 days later (March 22), a first frost 3 days later (November 15), a season 2 days shorter.

Measurable snow is rare here: only 3 of 23 winters from 1991 to 2020 recorded 0.1 inch or more at Williamston 1 E, NC, 3.4 miles away, so there is no typical first-snow date to plan around.

ZIP 27892 is 3 miles from Williamston 1 E, NC, which stands at 20 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 27892 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.