Frost Dates for 72846 — Lamar, Arkansas

Half of springs at Clarksville 6 NE, AR see their last 32°F night by March 25; only one in ten is past it by March 6, and one in ten still has one after April 12. Planting tender crops after April 2 leaves a 30% risk of a frost on them, after April 5 20%, and after April 12 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 60% of the 105 Arkansas stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 10 in half of years, as early as October 28 one year in ten, and holds off past November 30 one year in ten. A hard freeze of 28°F follows 13 days later, around November 23; in spring the one-in-ten date for 28°F is March 31, 12 days before the 32°F one. The freeze-free season lasts 232 days in a typical year, longer than at 70% of the 105 Arkansas stations; it reaches 254 days one year in ten and falls short of 210 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 13 days longer, to about April 7, and return around November 1. Severe cold of 16°F or below comes in 90% of winters, usually between January 1 and February 3.

July is the warmest month at Clarksville 6 NE, AR, averaging 90°F by day and 71°F at night; January is the coldest at 47°F and 29°F. A freezing night is all but certain in every month from December 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 34% of years.

Warmth for growing adds up to 4,862 growing degree days a year (base 50°F), fewer than at 62% of the 105 Arkansas stations. 37% of them (1,809) have built up by the end of June, and July adds the most, 939. Precipitation totals 52.8 inches a year, most in May (5.8") and least in February (3.4"); May to September bring 42% of it.

The nearest other station, Clarksville 2N, AR, 7 miles west of Lamar and 402 feet lower, has a last frost 1 day earlier (March 24), the same first-frost date, a season 1 day longer.

Measurable snow is rare here: only 9 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Clarksville 2N, AR, 6.6 miles away, so there is no typical first-snow date to plan around.

ZIP 72846 is 5 miles from Clarksville 6 NE, AR, which stands at 850 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 72846 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.