Frost Dates for 75948 — Hemphill, Texas

Half of springs at Toledo Bend Lake, LA see their last 32°F night by March 1; only one in ten is past it by February 4, and one in ten still has one after March 22. Planting tender crops after March 9 leaves a 30% risk of a frost on them, after March 14 20%, and after March 22 10%. The 21 days between the even-odds date and the one-in-ten date is wider than at 50% 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 30 in half of years, as early as November 9 one year in ten, and holds off past December 21 one year in ten. A hard freeze of 28°F follows 15 days later, around December 15; in spring the one-in-ten date for 28°F is March 9, 13 days before the 32°F one. The freeze-free season lasts 272 days in a typical year, longer than at 72% of the 339 Texas stations; it reaches 306 days one year in ten and falls short of 242 one year in ten. On average 22 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 14 days longer, to about March 15, and return around November 16. Nights of 24°F, cold enough to damage hardier plants, come in 82% of winters and 16°F in 13%.

August is the warmest month at Toledo Bend Lake, LA, averaging 94°F by day and 73°F at night; January is the coldest at 59°F and 38°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 49% of years.

Warmth for growing adds up to 6,457 growing degree days a year (base 50°F), more than at 54% of the 351 Texas stations. 41% of them (2,631) have built up by the end of June, and August adds the most, 1,024.

The nearest other station, Toledo Bend Dam, TX, 16 miles southeast of Hemphill, has a last frost 8 days later (March 9), a first frost 12 days earlier (November 18), a season 19 days shorter.

Measurable snow is rare here: only 3 of 17 winters from 1991 to 2020 recorded 0.1 inch or more at Hemphill 6 NE, TX, 5.5 miles away, so there is no typical first-snow date to plan around.

ZIP 75948 is 14 miles from Toledo Bend Lake, LA, which stands at 181 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 75948 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.