Frost Dates for 31410 — Savannah, Georgia

Half of springs at Savannah International Airport, GA see their last 32°F night by March 2; only one in ten is past it by February 4, and one in ten still has one after March 25. Planting tender crops after March 12 leaves a 30% risk of a frost on them, after March 17 20%, and after March 25 10%. The 23 days between the even-odds date and the one-in-ten date is wider than at 92% of the 127 Georgia stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by November 30 in half of years, as early as November 11 one year in ten, and holds off past December 28 one year in ten. A hard freeze of 28°F follows 22 days later, around December 22; in spring the one-in-ten date for 28°F is March 13, 12 days before the 32°F one. The freeze-free season lasts 270 days in a typical year, longer than at 94% of the 127 Georgia stations; it reaches 304 days one year in ten and falls short of 243 one year in ten. On average 21 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 17 days longer, to about March 19, and return around November 16. Nights of 24°F, cold enough to damage hardier plants, come in 78% of winters and 16°F in 4%.

July is the warmest month at Savannah International Airport, GA, averaging 92°F by day and 74°F at night; January is the coldest at 61°F and 40°F. A freezing night is all but certain in January (a 90% chance or more). From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 86% of years and March still brings one in 52% of years.

Warmth for growing adds up to 6,657 growing degree days a year (base 50°F), more than at 94% of the 127 Georgia stations. 42% of them (2,767) have built up by the end of June, and July adds the most, 1,023. Precipitation totals 48.3 inches a year, most in June (6.7") and least in November (2.4"); May to September bring 54% of it.

The nearest other station, Beaufort Wwtp, SC, 31 miles northeast of Savannah, has a last frost 1 day later (March 3), a first frost 9 days later (December 9), a season 12 days longer.

Measurable snow is rare here: only 4 of 30 winters from 1991 to 2020 recorded 0.1 inch or more at Savannah International Airport, GA, 14.8 miles away, so there is no typical first-snow date to plan around.

ZIP 31410 is 15 miles from Savannah International Airport, GA, which stands at 46 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 18 other ZIP codes share the station; its figures are presented in full for 31419 (Savannah). The 2023 USDA Plant Hardiness Zone Map lists ZIP 31410 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°C) over 1991–2020; a zone describes winter lows, not frost dates.