Frost Dates for 30263 — Newnan, Georgia

Half of springs at Newnan 7 WNW, GA see their last 32°F night by April 3; only one in ten is past it by March 16, and one in ten still has one after April 18. Planting tender crops after April 9 leaves a 30% risk of a frost on them, after April 13 20%, and after April 18 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 83% of the 127 Georgia stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 2 in half of years, as early as October 22 one year in ten, and holds off past November 18 one year in ten. A hard freeze of 28°F follows 13 days later, around November 15; in spring the one-in-ten date for 28°F is April 8, 10 days before the 32°F one. The freeze-free season lasts 214 days in a typical year, shorter than at 85% of the 127 Georgia stations; it reaches 237 days one year in ten and falls short of 193 one year in ten. On average 61 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 11 days longer, to about April 14, and return around October 25. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 83%.

July is the warmest month at Newnan 7 WNW, GA, averaging 90°F by day and 68°F at night; January is the coldest at 54°F and 31°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 58% of years.

Warmth for growing adds up to 4,984 growing degree days a year (base 50°F), fewer than at 73% of the 127 Georgia stations. 39% of them (1,957) have built up by the end of June, and July adds the most, 897. Precipitation totals 52.6 inches a year, most in March (5.4") and least in October (3.0"); May to September bring 40% of it.

The nearest other station, Atlanta, GA, 15 miles east of Newnan, has a last frost 8 days earlier (March 26), a first frost 4 days later (November 6), a season 12 days longer.

The first measurable snow (0.1 inch or more) in Newnan usually arrives around January 5, and the last of the season around January 18. Those are the middle dates across the winters of 1991–2020 at Newnan 7 WNW, GA, 5.2 miles away: half of years saw snow earlier, half later. Snow fell in 56% of those winters. The last 32°F night of spring typically comes 75 days after the last snow.

ZIP 30263 is 5 miles from Newnan 7 WNW, GA, which stands at 795 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 30263 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.