Frost Dates for 72740 — Huntsville, Arkansas

Half of springs at Huntsville 1 SSW, AR see their last 32°F night by March 30; only one in ten is past it by March 11, and one in ten still has one after April 15. Planting tender crops after April 5 leaves a 30% risk of a frost on them, after April 8 20%, and after April 15 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 23 one year in ten. A hard freeze of 28°F follows 10 days later, around November 17; in spring the one-in-ten date for 28°F is April 4, 11 days before the 32°F one. The freeze-free season lasts 224 days in a typical year, shorter than at 47% of the 105 Arkansas stations; it reaches 247 days one year in ten and falls short of 201 one year in ten. On average 67 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 10, and return around October 28. Severe cold of 16°F or below comes in 99% of winters, usually between December 22 and February 16.

July is the warmest month at Huntsville 1 SSW, AR, averaging 88°F by day and 69°F at night; January is the coldest at 47°F and 30°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 43% of years.

Warmth for growing adds up to 4,633 growing degree days a year (base 50°F), fewer than at 73% of the 105 Arkansas stations. 38% of them (1,757) have built up by the end of June, and July adds the most, 893. Precipitation totals 45.7 inches a year, most in May (5.1") and least in February (2.5"); May to September bring 45% of it.

The nearest other station, Winslow 7NE, AR, 26 miles southwest of Huntsville and 406 feet higher, has a last frost 6 days later (April 5), a first frost 2 days earlier (November 5), a season 13 days shorter.

The first measurable snow (0.1 inch or more) in Huntsville usually arrives around December 18, and the last of the season around March 6. Those are the middle dates across the winters of 1991–2020 at Huntsville 1 SSW, AR, 4.9 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 24 days after the last snow.

ZIP 72740 is 5 miles from Huntsville 1 SSW, AR, which stands at 1,783 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 72616 (Berryville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 72740 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.