Frost Dates for 72110 — Morrilton, Arkansas

Half of springs at Morrilton, 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 9 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 2 in half of years, as early as October 19 one year in ten, and holds off past November 20 one year in ten. A hard freeze of 28°F follows 12 days later, around November 14; in spring the one-in-ten date for 28°F is April 2, 13 days before the 32°F one. The freeze-free season lasts 219 days in a typical year, shorter than at 58% of the 105 Arkansas stations; it reaches 245 days one year in ten and falls short of 195 one year in ten. On average 81 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 24. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 86%.

July is the warmest month at Morrilton, AR, averaging 93°F by day and 71°F at night; January is the coldest at 50°F and 29°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 42% of years.

Warmth for growing adds up to 5,141 growing degree days a year (base 50°F), more than at 54% of the 105 Arkansas stations. 38% of them (1,965) have built up by the end of June, and July adds the most, 983. Precipitation totals 51.2 inches a year, most in May (5.5") and least in September (3.3"); May to September bring 39% of it.

The nearest other station, Conway, AR, 16 miles east of Morrilton, has a last frost 3 days later (April 2), the same first-frost date, a season 4 days shorter.

The first measurable snow (0.1 inch or more) in Morrilton usually arrives around December 31, and the last of the season around January 31. Those are the middle dates across the winters of 1991–2020 at Morrilton, AR, 0.5 miles away: half of years saw snow earlier, half later. Snow fell in 59% of those winters. The last 32°F night of spring typically comes 58 days after the last snow.

ZIP 72110 is under a mile from Morrilton, AR, which stands at 340 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 72110 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.