Frost Dates for 79356 — Post, Texas

Half of springs at Post, TX see their last 32°F night by April 1; only one in ten is past it by March 10, and one in ten still has one after April 19. Planting tender crops after April 7 leaves a 30% risk of a frost on them, after April 11 20%, and after April 19 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 75% of the 339 Texas stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 9 in half of years, as early as October 25 one year in ten, and holds off past November 23 one year in ten. A hard freeze of 28°F follows 10 days later, around November 19; in spring the one-in-ten date for 28°F is April 5, 14 days before the 32°F one. The freeze-free season lasts 223 days in a typical year, shorter than at 83% of the 339 Texas stations; it reaches 247 days one year in ten and falls short of 198 one year in ten. On average 68 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 9 days longer, to about April 10, and return around October 30. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 87%.

July is the warmest month at Post, TX, averaging 95°F by day and 70°F at night; January is the coldest at 56°F and 29°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 50% of years.

Warmth for growing adds up to 5,526 growing degree days a year (base 50°F), fewer than at 89% of the 351 Texas stations. 40% of them (2,204) have built up by the end of June, and July adds the most, 1,007. Precipitation totals 22.2 inches a year, most in June (3.3") and least in January (0.8"); May to September bring 62% of it.

The nearest other station, Tahoka, TX, 25 miles west of Post and 509 feet higher, has a last frost 1 day later (April 2), a first frost 1 day earlier (November 8), a season 3 days shorter.

The first measurable snow (0.1 inch or more) in Post usually arrives around December 23, and the last of the season around February 1. Those are the middle dates across the winters of 1991–2020 at Post, TX, 3.2 miles away: half of years saw snow earlier, half later. Snow fell in 64% of those winters. The last 32°F night of spring typically comes 59 days after the last snow.

ZIP 79356 is 3 miles from Post, TX, which stands at 2,611 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 79356 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.