Frost Dates for 72396 — Wynne, Arkansas

Half of springs at Wynne, AR see their last 32°F night by March 23; only one in ten is past it by March 3, and one in ten still has one after April 8. Planting tender crops after March 31 leaves a 30% risk of a frost on them, after April 3 20%, and after April 8 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 65% of the 105 Arkansas stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 7 in half of years, as early as October 24 one year in ten, and holds off past November 27 one year in ten. A hard freeze of 28°F follows 13 days later, around November 20; in spring the one-in-ten date for 28°F is March 28, 11 days before the 32°F one. The freeze-free season lasts 231 days in a typical year, longer than at 68% of the 105 Arkansas stations; it reaches 256 days one year in ten and falls short of 206 one year in ten. On average 60 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 4, and return around October 28. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 74%.

July is the warmest month at Wynne, AR, averaging 92°F by day and 73°F at night; January is the coldest at 49°F and 32°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 90% of years and April still brings one in 27% of years.

Warmth for growing adds up to 5,507 growing degree days a year (base 50°F), more than at 80% of the 105 Arkansas stations. 40% of them (2,196) have built up by the end of June, and July adds the most, 998. Precipitation totals 50.7 inches a year, most in April (5.7") and least in August (2.7"); May to September bring 36% of it.

The nearest other station, Beedeville 4 NE, AR, 20 miles northwest of Wynne, has the same 50% last-frost date, a first frost 2 days earlier (November 5), a season 4 days shorter.

The first measurable snow (0.1 inch or more) in Wynne usually arrives around January 13, and the last of the season around January 25. Those are the middle dates across the winters of 1991–2020 at Wynne, AR, 2.7 miles away: half of years saw snow earlier, half later. Snow fell in 80% of those winters. The last 32°F night of spring typically comes 57 days after the last snow.

ZIP 72396 is 3 miles from Wynne, AR, which stands at 260 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 72335 (Forrest City). The 2023 USDA Plant Hardiness Zone Map lists ZIP 72396 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.