Frost Dates for 72641 — Jasper, Arkansas

Half of springs at Deer, AR see their last 32°F night by April 7; only one in ten is past it by March 21, and one in ten still has one after April 22. Planting tender crops after April 13 leaves a 30% risk of a frost on them, after April 17 20%, and after April 22 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 86% of the 105 Arkansas stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 4 in half of years, as early as October 21 one year in ten, and holds off past November 19 one year in ten. A hard freeze of 28°F follows 8 days later, around November 12; in spring the one-in-ten date for 28°F is April 11, 11 days before the 32°F one. The freeze-free season lasts 211 days in a typical year, shorter than at 74% of the 105 Arkansas stations; it reaches 233 days one year in ten and falls short of 189 one year in ten. On average 89 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 11 days longer, to about April 18, and return around October 25. Severe cold of 16°F or below comes every winter, usually between December 20 and February 23.

July is the warmest month at Deer, AR, averaging 83°F by day and 68°F at night; January is the coldest at 42°F and 26°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 69% of years.

Warmth for growing adds up to 3,722 growing degree days a year (base 50°F), the fewest of the 105 Arkansas stations. 35% of them (1,313) have built up by the end of June, and July adds the most, 775. Precipitation totals 56.3 inches a year, most in May (6.6") and least in August (3.6"); May to September bring 40% of it.

The nearest other station, Harrison, AR, 17 miles northeast of Jasper and 1,243 feet lower, has a last frost 16 days earlier (March 22), a first frost 5 days later (November 9), a season 20 days longer.

The first measurable snow (0.1 inch or more) in Jasper usually arrives around December 25, and the last of the season around March 8. Those are the middle dates across the winters of 1991–2020 at Deer, AR, 10.7 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 30 days after the last snow.

ZIP 72641 is 11 miles from Deer, AR, which stands at 2,375 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 72641 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.