Frost Dates for 79360 — Seminole, Texas

Half of springs at Seminole, TX see their last 32°F night by April 2; only one in ten is past it by March 13, and one in ten still has one after April 20. Planting tender crops after April 8 leaves a 30% risk of a frost on them, after April 12 20%, and after April 20 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 6 in half of years, as early as October 25 one year in ten, and holds off past November 20 one year in ten. A hard freeze of 28°F follows 10 days later, around November 16; in spring the one-in-ten date for 28°F is April 4, 16 days before the 32°F one. The freeze-free season lasts 219 days in a typical year, shorter than at 87% of the 339 Texas stations; it reaches 241 days one year in ten and falls short of 195 one year in ten. On average 82 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 11 days longer, to about April 13, and return around October 29. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 88%.

July is the warmest month at Seminole, TX, averaging 94°F by day and 67°F at night; January is the coldest at 56°F and 28°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 54% of years.

Warmth for growing adds up to 5,190 growing degree days a year (base 50°F), fewer than at 90% of the 351 Texas stations. 40% of them (2,102) have built up by the end of June, and July adds the most, 949. Precipitation totals 17.3 inches a year, most in September (2.8") and least in January (0.7"); May to September bring 62% of it.

The nearest other station, Denver City, TX, 18 miles north of Seminole and 254 feet higher, has a last frost 5 days later (April 7), a first frost 2 days earlier (November 4), a season 10 days shorter.

The first measurable snow (0.1 inch or more) in Seminole usually arrives around December 5, and the last of the season around February 1. Those are the middle dates across the winters of 1991–2020 at Seminole, TX, 4.4 miles away: half of years saw snow earlier, half later. Snow fell in 78% of those winters. The last 32°F night of spring typically comes 60 days after the last snow.

ZIP 79360 is 4 miles from Seminole, TX, which stands at 3,336 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 79360 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.