Frost Dates for 36089 — Union Springs, Alabama

Half of springs at Union Springs 9 S, 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 13. Planting tender crops after April 1 leaves a 30% risk of a frost on them, after April 6 20%, and after April 13 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 55% of the 115 Alabama stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 6 in half of years, as early as October 24 one year in ten, and holds off past November 25 one year in ten. A hard freeze of 28°F follows 11 days later, around November 17; in spring the one-in-ten date for 28°F is March 30, 14 days before the 32°F one. The freeze-free season lasts 226 days in a typical year, shorter than at 63% of the 115 Alabama stations; it reaches 256 days one year in ten and falls short of 203 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 13 days longer, to about April 7, and return around October 29. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 54%.

July is the warmest month at Union Springs 9 S, AL, averaging 89°F by day and 70°F at night; January is the coldest at 58°F and 35°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 84% of years and April still brings one in 33% of years.

Warmth for growing adds up to 5,478 growing degree days a year (base 50°F), fewer than at 54% of the 115 Alabama stations. 40% of them (2,197) have built up by the end of June, and July adds the most, 921. Precipitation totals 57.1 inches a year, most in July (5.9") and least in October (3.4"); May to September bring 42% of it.

The nearest other station, Milstead, AL, 23 miles northwest of Union Springs and 225 feet lower, has the same 50% last-frost date, a first frost 2 days later (November 8), a season 2 days longer.

Measurable snow is rare here: only 4 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Union Springs 9 S, AL, 9.3 miles away, so there is no typical first-snow date to plan around.

ZIP 36089 is 9 miles from Union Springs 9 S, AL, which stands at 440 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 36089 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.