Frost Dates for 39307 — Meridian, Mississippi

Half of springs at Meridian Key Field, MS see their last 32°F night by March 16; only one in ten is past it by February 24, and one in ten still has one after April 3. Planting tender crops after March 23 leaves a 30% risk of a frost on them, after March 29 20%, and after April 3 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 53% of the 96 Mississippi stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 12 in half of years, as early as October 29 one year in ten, and holds off past December 2 one year in ten. A hard freeze of 28°F follows 15 days later, around November 27; in spring the one-in-ten date for 28°F is March 21, 13 days before the 32°F one. The freeze-free season lasts 239 days in a typical year, shorter than at 49% of the 96 Mississippi stations; it reaches 269 days one year in ten and falls short of 214 one year in ten. On average 48 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 31, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 97% of winters and 16°F in 39%.

July is the warmest month at Meridian Key Field, MS, averaging 93°F by day and 72°F at night; January is the coldest at 59°F and 36°F. A freezing night is all but certain in every month from December 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 77% of years and April still brings one in 14% of years.

Warmth for growing adds up to 6,279 growing degree days a year (base 50°F), more than at 77% of the 96 Mississippi stations. 41% of them (2,600) have built up by the end of June, and July adds the most, 1,012. Precipitation totals 57.2 inches a year, most in March (5.7") and least in September (3.2"); May to September bring 38% of it.

The nearest other station, Meridian Naas, MS, 17 miles northeast of Meridian, has a last frost 2 days earlier (March 14), the same first-frost date, a season 6 days longer.

Measurable snow is rare here: only 7 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Meridian Key Field, MS, 1.7 miles away, so there is no typical first-snow date to plan around.

ZIP 39307 is 2 miles from Meridian Key Field, MS, which stands at 294 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 39305 (Meridian). The 2023 USDA Plant Hardiness Zone Map lists ZIP 39307 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.