Frost Dates for 30814 — Harlem, Georgia

Half of springs at Appling 2 NW, GA see their last 32°F night by March 27; only one in ten is past it by March 7, and one in ten still has one after April 13. Planting tender crops after April 3 leaves a 30% risk of a frost on them, after April 7 20%, and after April 13 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 56% of the 127 Georgia 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 11 days later, around November 18; in spring the one-in-ten date for 28°F is March 31, 13 days before the 32°F one. The freeze-free season lasts 226 days in a typical year, shorter than at 65% of the 127 Georgia stations; it reaches 251 days one year in ten and falls short of 204 one year in ten. On average 66 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 8, and return around October 30. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 62%.

July is the warmest month at Appling 2 NW, GA, averaging 92°F by day and 70°F at night; January is the coldest at 57°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 36% of years.

Warmth for growing adds up to 5,414 growing degree days a year (base 50°F), fewer than at 53% of the 127 Georgia stations. 40% of them (2,159) have built up by the end of June, and July adds the most, 956.

The nearest other station, Thomson 1.5SE, GA, 10 miles west of Harlem, has a last frost 13 days earlier (March 14), a first frost 10 days later (November 17), a season 26 days longer.

Measurable snow is rare here: only 0 of 26 winters from 1991 to 2020 recorded 0.1 inch or more at Appling 2 NW, GA, 9.4 miles away, so there is no typical first-snow date to plan around.

ZIP 30814 is 9 miles from Appling 2 NW, GA, which stands at 396 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 30814 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°C) over 1991–2020; a zone describes winter lows, not frost dates.