Frost Dates for 35057 — Cullman, Alabama

Half of springs at Saint Bernard, AL see their last 32°F night by March 31; only one in ten is past it by March 14, and one in ten still has one after April 20. Planting tender crops after April 9 leaves a 30% risk of a frost on them, after April 14 20%, and after April 20 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 1 in half of years, as early as October 20 one year in ten, and holds off past November 16 one year in ten. A hard freeze of 28°F follows 10 days later, around November 11; in spring the one-in-ten date for 28°F is April 7, 13 days before the 32°F one. The freeze-free season lasts 215 days in a typical year, shorter than at 78% of the 115 Alabama stations; it reaches 239 days one year in ten and falls short of 192 one year in ten. On average 73 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 13, and return around October 24. Severe cold of 16°F or below comes in 92% of winters, usually between December 29 and February 1.

July is the warmest month at Saint Bernard, AL, averaging 90°F by day and 69°F at night; January is the coldest at 52°F and 32°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 48% of years.

Warmth for growing adds up to 5,099 growing degree days a year (base 50°F), fewer than at 73% of the 115 Alabama stations. 39% of them (2,009) have built up by the end of June, and July adds the most, 913. Precipitation totals 60.3 inches a year, most in February (5.9") and least in August (3.9"); May to September bring 38% of it.

The nearest other station, Cullman 3 ENE, AL, 8 miles northeast of Cullman, has a last frost 5 days later (April 5), the same first-frost date, a season 5 days shorter.

Measurable snow is rare here: only 8 of 22 winters from 1991 to 2020 recorded 0.1 inch or more at Saint Bernard, AL, 6.8 miles away, so there is no typical first-snow date to plan around.

ZIP 35057 is 7 miles from Saint Bernard, AL, which stands at 800 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 35055 (Cullman). The 2023 USDA Plant Hardiness Zone Map lists ZIP 35057 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.