Frost Dates for 78361 — Hebbronville, Texas

Half of springs at Hebbronville, TX see their last 32°F night by February 4; only one in ten is past it by December 28, and one in ten still has one after March 7. Planting tender crops after February 19 leaves a 30% risk of a frost on them, after February 28 20%, and after March 7 10%. The 31 days between the even-odds date and the one-in-ten date is wider than at 92% 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 12 in half of years, as early as November 22 one year in ten, and holds off past January 18 one year in ten. A hard freeze of 28°F follows 18 days later, around December 30; in spring the one-in-ten date for 28°F is February 28, 7 days before the 32°F one. The freeze-free season lasts 320 days in a typical year, longer than at 92% of the 339 Texas stations; it reaches 360 days one year in ten and falls short of 278 one year in ten. On average 8 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 19 days longer, to about February 23, and return around December 1. A 24°F night is unusual: 29% of winters had one.

August is the warmest month at Hebbronville, TX, averaging 100°F by day and 75°F at night; January is the coldest at 70°F and 46°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 41% of years and March still brings one in 18% of years.

Warmth for growing adds up to 8,853 growing degree days a year (base 50°F), more than at 95% of the 351 Texas stations. 45% of them (3,989) have built up by the end of June, and August adds the most, 1,162. Precipitation totals 22.9 inches a year, most in September (4.1") and least in January (1.2"); May to September bring 56% of it.

The nearest other station, Benavides 2, TX, 35 miles northeast of Hebbronville and 200 feet lower, has a last frost 16 days later (February 20), a first frost 11 days earlier (December 1), a season 34 days shorter.

Measurable snow is rare here: only 1 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Hebbronville, TX, 10.7 miles away, so there is no typical first-snow date to plan around.

ZIP 78361 is 11 miles from Hebbronville, TX, which stands at 580 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 78361 in zone 9b, the band where the coldest night of the year averaged 25 to 30°F (-3.9 to -1.1°C) over 1991–2020; a zone describes winter lows, not frost dates.