Frost Dates for 39170 — Terry, Mississippi

Half of springs at Crystal Spgs Exp Stn, MS see their last 32°F night by March 11; only one in ten is past it by February 21, and one in ten still has one after March 30. Planting tender crops after March 18 leaves a 30% risk of a frost on them, after March 24 20%, and after March 30 10%. The 19 days between the even-odds date and the one-in-ten date is narrower than at 38% of the 96 Mississippi stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 16 in half of years, as early as November 1 one year in ten, and holds off past December 6 one year in ten. A hard freeze of 28°F follows 12 days later, around November 28; in spring the one-in-ten date for 28°F is March 16, 14 days before the 32°F one. The freeze-free season lasts 250 days in a typical year, longer than at 75% of the 96 Mississippi stations; it reaches 279 days one year in ten and falls short of 225 one year in ten. On average 37 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 15 days longer, to about March 26, and return around November 6. Nights of 24°F, cold enough to damage hardier plants, come in 97% of winters and 16°F in 45%.

July is the warmest month at Crystal Spgs Exp Stn, MS, averaging 92°F by day and 71°F at night; January is the coldest at 58°F and 37°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 76% of years.

Warmth for growing adds up to 6,170 growing degree days a year (base 50°F), more than at 68% of the 96 Mississippi stations. 41% of them (2,534) have built up by the end of June, and July adds the most, 984. Precipitation totals 62.6 inches a year, most in January (6.1") and least in October (3.4"); May to September bring 40% of it.

The nearest other station, Oakley Exp Stn, MS, 12 miles northwest of Terry and 282 feet lower, has a last frost 5 days later (March 16), a first frost 10 days earlier (November 6), a season 14 days shorter.

Measurable snow is rare here: only 6 of 27 winters from 1991 to 2020 recorded 0.1 inch or more at Crystal Spgs Exp Stn, MS, 12.3 miles away, so there is no typical first-snow date to plan around.

ZIP 39170 is 12 miles from Crystal Spgs Exp Stn, MS, which stands at 487 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 39059 (Crystal Springs). The 2023 USDA Plant Hardiness Zone Map lists ZIP 39170 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.