Frost Dates for 39664 — Smithdale, Mississippi

Half of springs at Liberty, MS see their last 32°F night by March 25; only one in ten is past it by February 26, and one in ten still has one after April 15. Planting tender crops after April 4 leaves a 30% risk of a frost on them, after April 8 20%, and after April 15 10%. The 21 days between the even-odds date and the one-in-ten date is wider than at 73% of the 96 Mississippi stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by November 8 in half of years, as early as October 25 one year in ten, and holds off past November 25 one year in ten. A hard freeze of 28°F follows 12 days later, around November 20; in spring the one-in-ten date for 28°F is April 1, 14 days before the 32°F one. The freeze-free season lasts 230 days in a typical year, shorter than at 69% of the 96 Mississippi stations; it reaches 260 days one year in ten and falls short of 203 one year in ten. On average 47 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 14 days longer, to about April 8, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 58%.

August is the warmest month at Liberty, MS, averaging 92°F by day and 69°F at night; January is the coldest at 60°F and 37°F. A freezing night is all but certain in every month from November to February (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 81% of years and April still brings one in 38% of years.

Warmth for growing adds up to 6,010 growing degree days a year (base 50°F), more than at 60% of the 96 Mississippi stations. 41% of them (2,471) have built up by the end of June, and August adds the most, 945. Precipitation totals 61.8 inches a year, most in January (6.8") and least in September (3.6"); May to September bring 40% of it.

The nearest other station, Meadville, MS, 16 miles northwest of Smithdale, has a last frost 10 days earlier (March 15), a first frost 4 days later (November 12), a season 13 days longer.

Measurable snow is rare here: only 0 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Liberty, MS, 13.9 miles away, so there is no typical first-snow date to plan around.

ZIP 39664 is 14 miles from Liberty, MS, which stands at 328 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 39645 (Liberty). The 2023 USDA Plant Hardiness Zone Map lists ZIP 39664 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°C) over 1991–2020; a zone describes winter lows, not frost dates.