Frost Dates for 29429 — Awendaw, South Carolina

Half of springs at Mcclellanville, SC see their last 32°F night by March 17; only one in ten is past it by February 25, and one in ten still has one after April 4. Planting tender crops after March 26 leaves a 30% risk of a frost on them, after March 30 20%, and after April 4 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 77% of the 105 South Carolina stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 21 in half of years, as early as November 4 one year in ten, and holds off past December 12 one year in ten. A hard freeze of 28°F follows 15 days later, around December 6; in spring the one-in-ten date for 28°F is March 25, 10 days before the 32°F one. The freeze-free season lasts 250 days in a typical year, longer than at 85% of the 105 South Carolina stations; it reaches 282 days one year in ten and falls short of 225 one year in ten. On average 34 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 14 days longer, to about March 31, and return around November 9. Nights of 24°F, cold enough to damage hardier plants, come in 96% of winters and 16°F in 28%.

July is the warmest month at Mcclellanville, SC, averaging 91°F by day and 73°F at night; January is the coldest at 60°F and 36°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From May to October the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 81% of years and April still brings one in 16% of years.

Warmth for growing adds up to 6,020 growing degree days a year (base 50°F), more than at 87% of the 105 South Carolina stations. 40% of them (2,384) have built up by the end of June, and July adds the most, 986.

The nearest other station, Sullivans Is, SC, 18 miles southwest of Awendaw, has a last frost 4 days earlier (March 13), a first frost 9 days later (November 30), a season 12 days longer.

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Sullivans Is, SC, 18.5 miles away, so there is no typical first-snow date to plan around.

ZIP 29429 is 13 miles from Mcclellanville, SC, which stands at 12 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 29429 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°C) over 1991–2020; a zone describes winter lows, not frost dates.