Frost Dates for 71047 — Keithville, Louisiana

Half of springs at Shreveport Sthrn Hills, LA see their last 32°F night by March 12; only one in ten is past it by February 20, and one in ten still has one after April 1. Planting tender crops after March 21 leaves a 30% risk of a frost on them, after March 26 20%, and after April 1 10%. The 20 days between the even-odds date and the one-in-ten date is narrower than at 72% of the 88 Louisiana 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 October 31 one year in ten, and holds off past December 5 one year in ten. A hard freeze of 28°F follows 16 days later, around December 1; in spring the one-in-ten date for 28°F is March 17, 15 days before the 32°F one. The freeze-free season lasts 247 days in a typical year, shorter than at 82% of the 88 Louisiana stations; it reaches 275 days one year in ten and falls short of 221 one year in ten. On average 44 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 17 days longer, to about March 29, and return around November 4. Nights of 24°F, cold enough to damage hardier plants, come in 96% of winters and 16°F in 29%.

August is the warmest month at Shreveport Sthrn Hills, LA, averaging 94°F by day and 72°F at night; January is the coldest at 56°F and 35°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 73% of years and April still brings one in 11% of years.

Warmth for growing adds up to 5,985 growing degree days a year (base 50°F), fewer than at 90% of the 88 Louisiana stations. 40% of them (2,415) have built up by the end of June, and August adds the most, 1,015. Precipitation totals 55.6 inches a year, most in December (5.4") and least in August (3.2"); May to September bring 38% of it.

The nearest other station, Shreveport, LA, 10 miles north of Keithville, has a last frost 3 days earlier (March 9), a first frost 3 days later (November 18), a season 8 days longer.

Measurable snow is rare here: only 8 of 30 winters from 1991 to 2020 recorded 0.1 inch or more at Keithville, LA, 3.2 miles away, so there is no typical first-snow date to plan around.

ZIP 71047 is 8 miles from Shreveport Sthrn Hills, LA, which stands at 200 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 71106 (Shreveport). The 2023 USDA Plant Hardiness Zone Map lists ZIP 71047 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.