Frost Dates for 30286 — Thomaston, Georgia

Half of springs at Thomaston 4SE, GA see their last 32°F night by March 23; only one in ten is past it by March 1, and one in ten still has one after April 11. Planting tender crops after March 31 leaves a 30% risk of a frost on them, after April 4 20%, and after April 11 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 60% of the 127 Georgia 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 November 28 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 29, 13 days before the 32°F one. The freeze-free season lasts 234 days in a typical year, shorter than at 51% of the 127 Georgia stations; it reaches 257 days one year in ten and falls short of 212 one year in ten. On average 50 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 5, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 61%.

July is the warmest month at Thomaston 4SE, GA, averaging 91°F by day and 69°F at night; January is the coldest at 58°F and 33°F. A freezing night is all but certain in every month from November 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 28% of years.

Warmth for growing adds up to 5,500 growing degree days a year (base 50°F), more than at 50% of the 127 Georgia stations. 40% of them (2,180) have built up by the end of June, and July adds the most, 933. Precipitation totals 50.4 inches a year, most in July (5.4") and least in May (2.9"); May to September bring 41% of it.

The nearest other station, The Rock Rch, GA, 8 miles northeast of Thomaston and 201 feet higher, has a last frost 5 days earlier (March 18), a first frost 2 days later (November 14), a season 5 days longer.

Measurable snow is rare here: only 4 of 23 winters from 1991 to 2020 recorded 0.1 inch or more at Thomaston 4SE, GA, 4.3 miles away, so there is no typical first-snow date to plan around.

ZIP 30286 is 4 miles from Thomaston 4SE, GA, which stands at 620 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 30286 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.