Frost Dates for 39339 — Louisville, Mississippi

Half of springs at Louisville, MS see their last 32°F night by March 21; only one in ten is past it by March 1, and one in ten still has one after April 9. Planting tender crops after March 30 leaves a 30% risk of a frost on them, after April 3 20%, and after April 9 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 13 in half of years, as early as October 30 one year in ten, and holds off past December 1 one year in ten. A hard freeze of 28°F follows 14 days later, around November 27; in spring the one-in-ten date for 28°F is March 24, 16 days before the 32°F one. The freeze-free season lasts 235 days in a typical year, shorter than at 59% of the 96 Mississippi stations; it reaches 261 days one year in ten and falls short of 209 one year in ten. On average 54 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 4, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 61%.

July is the warmest month at Louisville, MS, averaging 92°F by day and 71°F at night; January is the coldest at 55°F and 34°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 86% of years and April still brings one in 27% of years.

Warmth for growing adds up to 5,655 growing degree days a year (base 50°F), fewer than at 63% of the 96 Mississippi stations. 40% of them (2,285) have built up by the end of June, and July adds the most, 962. Precipitation totals 57.7 inches a year, most in February (5.7") and least in June (4.0"); May to September bring 39% of it.

The nearest other station, Philadelphia 1 WSW, MS, 24 miles south of Louisville and 168 feet lower, has a last frost 1 day earlier (March 20), a first frost 4 days earlier (November 9).

Measurable snow is rare here: only 5 of 25 winters from 1991 to 2020 recorded 0.1 inch or more at Louisville, MS, 3 miles away, so there is no typical first-snow date to plan around.

ZIP 39339 is 3 miles from Louisville, MS, which stands at 581 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 39339 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.