Frost Dates for 36421 — Andalusia, Alabama

Half of springs at Andalusia 3 W, AL see their last 32°F night by March 25; only one in ten is past it by February 28, and one in ten still has one after April 14. Planting tender crops after April 1 leaves a 30% risk of a frost on them, after April 6 20%, and after April 14 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 70% of the 115 Alabama stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 9 in half of years, as early as October 25 one year in ten, and holds off past December 1 one year in ten. A hard freeze of 28°F follows 13 days later, around November 22; in spring the one-in-ten date for 28°F is March 29, 16 days before the 32°F one. The freeze-free season lasts 230 days in a typical year, shorter than at 52% of the 115 Alabama stations; it reaches 261 days one year in ten and falls short of 204 one year in ten. On average 58 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 6, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 53%.

July is the warmest month at Andalusia 3 W, AL, averaging 91°F by day and 70°F at night; January is the coldest at 61°F and 35°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 82% of years and April still brings one in 32% of years.

Warmth for growing adds up to 5,889 growing degree days a year (base 50°F), more than at 70% of the 115 Alabama stations. 41% of them (2,413) have built up by the end of June, and July adds the most, 942. Precipitation totals 60.3 inches a year, most in August (6.3") and least in October (3.4"); May to September bring 46% of it.

The nearest other station, Andalusia Opp Airport, AL, 6 miles southeast of Andalusia, has a last frost 25 days earlier (February 28), a first frost 19 days later (November 28), a season 44 days longer.

Measurable snow is rare here: only 1 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Andalusia 3 W, AL, 5.3 miles away, so there is no typical first-snow date to plan around.

ZIP 36421 is 5 miles from Andalusia 3 W, AL, which stands at 250 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 36420 (Andalusia). The 2023 USDA Plant Hardiness Zone Map lists ZIP 36421 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.