Frost Dates for 29365 — Lyman, South Carolina

Half of springs at Greer, SC see their last 32°F night by March 28; only one in ten is past it by March 10, and one in ten still has one after April 14. Planting tender crops after April 4 leaves a 30% risk of a frost on them, after April 7 20%, and after April 14 10%. The 17 days between the even-odds date and the one-in-ten date is wider than at 57% of the 105 South Carolina stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 7 in half of years, as early as October 26 one year in ten, and holds off past November 24 one year in ten. A hard freeze of 28°F follows 13 days later, around November 20; in spring the one-in-ten date for 28°F is April 3, 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 203 one year in ten. On average 54 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 April 9, and return around October 29. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 74%.

July is the warmest month at Greer, SC, averaging 90°F by day and 69°F at night; January is the coldest at 53°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 41% of years.

Warmth for growing adds up to 4,981 growing degree days a year (base 50°F), fewer than at 78% of the 105 South Carolina stations. 39% of them (1,958) have built up by the end of June, and July adds the most, 922. Precipitation totals 49.6 inches a year, most in July (4.8") and least in October (3.6"); May to September bring 43% of it.

The nearest other station, Spartanburg 3 SSE, SC, 14 miles east of Lyman and 330 feet lower, has a last frost 11 days later (April 8), a first frost 6 days earlier (November 1), a season 18 days shorter.

The first measurable snow (0.1 inch or more) in Lyman usually arrives around January 16, and the last of the season around February 13. Those are the middle dates across the winters of 1991–2020 at Greer, SC, 7.1 miles away: half of years saw snow earlier, half later. Snow fell in 90% of those winters. The last 32°F night of spring typically comes 43 days after the last snow.

ZIP 29365 is 7 miles from Greer, SC, which stands at 940 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 29651 (Greer). The 2023 USDA Plant Hardiness Zone Map lists ZIP 29365 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.