Frost Dates for 30621 — Bishop, Georgia

Half of springs at Watkinsville 5 SSE, GA see their last 32°F night by March 24; only one in ten is past it by March 1, and one in ten still has one after April 12. Planting tender crops after April 2 leaves a 30% risk of a frost on them, after April 5 20%, and after April 12 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 December 2 one year in ten. A hard freeze of 28°F follows 16 days later, around November 28; in spring the one-in-ten date for 28°F is March 28, 15 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 263 days one year in ten and falls short of 207 one year in ten. On average 45 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 14 days longer, to about April 7, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 98% of winters and 16°F in 52%.

July is the warmest month at Watkinsville 5 SSE, GA, averaging 90°F by day and 69°F at night; January is the coldest at 54°F and 34°F. A freezing night is all but certain in every month from December 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 86% of years and April still brings one in 33% of years.

Warmth for growing adds up to 5,069 growing degree days a year (base 50°F), fewer than at 68% of the 127 Georgia stations. 40% of them (2,012) have built up by the end of June, and July adds the most, 904. Precipitation totals 47.8 inches a year, most in December (4.9") and least in May (2.7"); May to September bring 40% of it.

The nearest other station, U Of Ga Plt Sci, GA, 6 miles northwest of Bishop, has a last frost 3 days later (March 27), a first frost 4 days earlier (November 8), a season 6 days shorter.

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at U Of Ga Plt Sci, GA, 5.6 miles away, so there is no typical first-snow date to plan around.

ZIP 30621 is 6 miles from Watkinsville 5 SSE, GA, which stands at 741 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 30677 (Watkinsville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 30621 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.