Frost Dates for 78638 — Kingsbury, Texas

Half of springs at Luling, TX see their last 32°F night by March 5; only one in ten is past it by February 7, and one in ten still has one after April 3. Planting tender crops after March 14 leaves a 30% risk of a frost on them, after March 23 20%, and after April 3 10%. The 29 days between the even-odds date and the one-in-ten date is wider than at 90% 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 November 23 in half of years, as early as November 3 one year in ten, and holds off past December 14 one year in ten. A hard freeze of 28°F follows 13 days later, around December 6; in spring the one-in-ten date for 28°F is March 13, 21 days before the 32°F one. The freeze-free season lasts 263 days in a typical year, longer than at 68% of the 339 Texas stations; it reaches 294 days one year in ten and falls short of 232 one year in ten. On average 29 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 22, and return around November 10. Nights of 24°F, cold enough to damage hardier plants, come in 81% of winters and 16°F in 9%.

August is the warmest month at Luling, TX, averaging 98°F by day and 73°F at night; January is the coldest at 64°F and 40°F. A freezing night is all but certain in every month from December to January (a 90% chance or more). From May to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 84% of years and March still brings one in 56% of years and April still brings one in 12% of years.

Warmth for growing adds up to 7,375 growing degree days a year (base 50°F), more than at 76% of the 351 Texas stations. 42% of them (3,109) have built up by the end of June, and August adds the most, 1,108. Precipitation totals 35.5 inches a year, most in May (4.2") and least in July (1.9"); May to September bring 44% of it.

The nearest other station, Austin San Antonio, TX, 16 miles west of Kingsbury and 233 feet higher, has a last frost 4 days earlier (March 1), a first frost 3 days later (November 26), a season 10 days longer.

Measurable snow is rare here: only 1 of 16 winters from 1991 to 2020 recorded 0.1 inch or more at Kingsbury, TX, 1.9 miles away, so there is no typical first-snow date to plan around.

ZIP 78638 is 7 miles from Luling, TX, which stands at 400 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 78644 (Lockhart). The 2023 USDA Plant Hardiness Zone Map lists ZIP 78638 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.