Frost Dates for 39459 — Moselle, Mississippi

Half of springs at Hattiesburg Chain Municipal Airport, MS see their last 32°F night by March 8; only one in ten is past it by February 16, and one in ten still has one after March 28. Planting tender crops after March 16 leaves a 30% risk of a frost on them, after March 22 20%, and after March 28 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 64% of the 96 Mississippi stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 15 in half of years, as early as November 1 one year in ten, and holds off past December 4 one year in ten. A hard freeze of 28°F follows 15 days later, around November 30; in spring the one-in-ten date for 28°F is March 15, 13 days before the 32°F one. The freeze-free season lasts 252 days in a typical year, longer than at 78% of the 96 Mississippi stations; it reaches 283 days one year in ten and falls short of 225 one year in ten. On average 34 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 16 days longer, to about March 24, and return around November 4. Nights of 24°F, cold enough to damage hardier plants, come in 91% of winters and 16°F in 23%.

July is the warmest month at Hattiesburg Chain Municipal Airport, MS, averaging 92°F by day and 72°F at night; January is the coldest at 60°F and 38°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From April to October the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 63% of years.

Warmth for growing adds up to 6,396 growing degree days a year (base 50°F), more than at 88% of the 96 Mississippi stations. 42% of them (2,683) have built up by the end of June, and July adds the most, 990. Precipitation totals 59.1 inches a year, most in June (5.9") and least in October (3.7"); May to September bring 42% of it.

The nearest other station, Laurel, MS, 16 miles northeast of Moselle, has a last frost 4 days later (March 12), a first frost 3 days earlier (November 12), a season 8 days shorter.

Measurable snow is rare here: only 7 of 28 winters from 1991 to 2020 recorded 0.1 inch or more at Sumrall, MS, 14.7 miles away, so there is no typical first-snow date to plan around.

ZIP 39459 is 15 miles from Hattiesburg Chain Municipal Airport, MS, which stands at 151 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 39401 (Hattiesburg). The 2023 USDA Plant Hardiness Zone Map lists ZIP 39459 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.