Frost Dates for 78014 — Cotulla, Texas

Half of springs at Cotulla La Salle Co Airport, TX see their last 32°F night by February 11; only one in ten is past it by January 5, and one in ten still has one after March 9. Planting tender crops after February 24 leaves a 30% risk of a frost on them, after March 2 20%, and after March 9 10%. The 26 days between the even-odds date and the one-in-ten date is wider than at 84% of the 339 Texas stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by December 3 in half of years, as early as November 15 one year in ten, and holds off past January 5 one year in ten. A hard freeze of 28°F follows 16 days later, around December 19; in spring the one-in-ten date for 28°F is February 28, 9 days before the 32°F one. The freeze-free season lasts 300 days in a typical year, longer than at 87% of the 339 Texas stations; it reaches 339 days one year in ten and falls short of 262 one year in ten. On average 10 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 18 days longer, to about March 1, and return around November 23. A 24°F night is unusual: 41% of winters had one.

August is the warmest month at Cotulla La Salle Co Airport, TX, averaging 100°F by day and 75°F at night; January is the coldest at 67°F and 44°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 50% of years and March still brings one in 23% of years.

Warmth for growing adds up to 8,524 growing degree days a year (base 50°F), more than at 93% of the 351 Texas stations. 45% of them (3,804) have built up by the end of June, and August adds the most, 1,167. Precipitation totals 21.9 inches a year, most in May (3.0") and least in January (0.9"); May to September bring 56% of it.

The nearest other station, Dilley, TX, 17 miles north of Cotulla, has a last frost 5 days later (February 16), a first frost 3 days later (December 6), a season 4 days shorter.

Measurable snow is rare here: only 1 of 17 winters from 1991 to 2020 recorded 0.1 inch or more at Dilley, TX, 17.1 miles away, so there is no typical first-snow date to plan around.

ZIP 78014 is 2 miles from Cotulla La Salle Co Airport, TX, which stands at 476 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 78014 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°C) over 1991–2020; a zone describes winter lows, not frost dates.