Frost Dates for 78834 — Carrizo Springs, Texas

Half of springs at Carrizo Springs 3S, TX see their last 32°F night by March 5; only one in ten is past it by February 10, and one in ten still has one after March 30. Planting tender crops after March 14 leaves a 30% risk of a frost on them, after March 20 20%, and after March 30 10%. The 25 days between the even-odds date and the one-in-ten date is wider than at 82% 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 22 in half of years, as early as November 6 one year in ten, and holds off past December 11 one year in ten. A hard freeze of 28°F follows 13 days later, around December 5; in spring the one-in-ten date for 28°F is March 15, 15 days before the 32°F one. The freeze-free season lasts 265 days in a typical year, longer than at 69% of the 339 Texas stations; it reaches 295 days one year in ten and falls short of 236 one year in ten. On average 25 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 13 days longer, to about March 18, and return around November 12. Nights of 24°F, cold enough to damage hardier plants, come in 88% of winters and 16°F in 13%.

August is the warmest month at Carrizo Springs 3S, TX, averaging 100°F by day and 74°F at night; January is the coldest at 67°F and 37°F. A freezing night is all but certain in every month from December to January (a 90% chance or more). From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 88% of years and March still brings one in 57% of years.

Warmth for growing adds up to 7,759 growing degree days a year (base 50°F), more than at 85% of the 351 Texas stations. 44% of them (3,391) have built up by the end of June, and August adds the most, 1,138. Precipitation totals 19.7 inches a year, most in September (3.3") and least in February (0.8"); May to September bring 56% of it.

The nearest other station, Crystal City, TX, 11 miles north of Carrizo Springs, has a last frost 23 days earlier (February 10), a first frost 18 days later (December 10), a season 42 days longer.

Measurable snow is rare here: only 1 of 24 winters from 1991 to 2020 recorded 0.1 inch or more at Carrizo Springs 3S, TX, 3.2 miles away, so there is no typical first-snow date to plan around.

ZIP 78834 is 3 miles from Carrizo Springs 3S, TX, which stands at 613 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 78834 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.