Frost Dates for 38642 — Lamar, Mississippi

Half of springs at Holly Springs 4 N, MS see their last 32°F night by April 6; only one in ten is past it by March 18, and one in ten still has one after April 23. Planting tender crops after April 12 leaves a 30% risk of a frost on them, after April 17 20%, and after April 23 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 71% of the 96 Mississippi stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 28 in half of years, as early as October 14 one year in ten, and holds off past November 10 one year in ten. A hard freeze of 28°F follows 10 days later, around November 7; in spring the one-in-ten date for 28°F is April 10, 13 days before the 32°F one. The freeze-free season lasts 206 days in a typical year, shorter than at 96% of the 96 Mississippi stations; it reaches 230 days one year in ten and falls short of 183 one year in ten. On average 83 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 10 days longer, to about April 16, and return around October 19. Severe cold of 16°F or below comes in 93% of winters, usually between December 25 and February 7.

July is the warmest month at Holly Springs 4 N, MS, averaging 89°F by day and 67°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 64% of years.

Warmth for growing adds up to 4,656 growing degree days a year (base 50°F), fewer than at 99% of the 96 Mississippi stations. 40% of them (1,846) have built up by the end of June, and July adds the most, 865. Precipitation totals 55.7 inches a year, most in April (5.9") and least in August (2.7"); May to September bring 37% of it.

The nearest other station, Holly Springs 4 N, MS, 9 miles southwest of Lamar, has the same 50% last-frost date, a first frost 2 days earlier (October 26), a season 2 days shorter.

The first measurable snow (0.1 inch or more) in Lamar usually arrives around January 28, and the last of the season around February 6. Those are the middle dates across the winters of 1991–2020 at Holly Springs 4 N, MS, 9.3 miles away: half of years saw snow earlier, half later. Snow fell in 76% of those winters. The last 32°F night of spring typically comes 59 days after the last snow.

ZIP 38642 is 9 miles from Holly Springs 4 N, MS, which stands at 484 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 38642 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.