Frost Dates for 29101 — Mc Bee, South Carolina

Half of springs at Hartsville, SC see their last 32°F night by March 30; only one in ten is past it by March 11, and one in ten still has one after April 13. Planting tender crops after April 4 leaves a 30% risk of a frost on them, after April 8 20%, and after April 13 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 84% of the 105 South Carolina stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 6 in half of years, as early as October 26 one year in ten, and holds off past November 23 one year in ten. A hard freeze of 28°F follows 12 days later, around November 18; in spring the one-in-ten date for 28°F is April 2, 11 days before the 32°F one. The freeze-free season lasts 224 days in a typical year, shorter than at 67% of the 105 South Carolina stations; it reaches 248 days one year in ten and falls short of 201 one year in ten. On average 62 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 10 days longer, to about April 9, and return around October 30. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 71%.

July is the warmest month at Hartsville, SC, averaging 92°F by day and 70°F at night; January is the coldest at 55°F and 32°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 42% of years.

Warmth for growing adds up to 5,336 growing degree days a year (base 50°F), fewer than at 53% of the 105 South Carolina stations. 40% of them (2,109) have built up by the end of June, and July adds the most, 964. Precipitation totals 48.5 inches a year, most in July (5.9") and least in November (2.9"); May to September bring 51% of it.

The nearest other station, Bishopville 1ENE, SC, 17 miles south of Mc Bee, has a last frost 1 day earlier (March 29), a first frost 2 days earlier (November 4), a season 2 days shorter.

Measurable snow is rare here: only 2 of 16 winters from 1991 to 2020 recorded 0.1 inch or more at Hartsville, SC, 12.4 miles away, so there is no typical first-snow date to plan around.

ZIP 29101 is 12 miles from Hartsville, SC, which stands at 185 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 29550 (Hartsville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 29101 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.