Frost Dates for 75433 — Cumby, Texas

Half of springs at Sulphur Springs, TX see their last 32°F night by March 15; only one in ten is past it by February 25, and one in ten still has one after April 4. Planting tender crops after March 23 leaves a 30% risk of a frost on them, after March 29 20%, and after April 4 10%. The 20 days between the even-odds date and the one-in-ten date is narrower than at 51% of the 339 Texas stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 14 in half of years, as early as October 29 one year in ten, and holds off past December 3 one year in ten. A hard freeze of 28°F follows 14 days later, around November 28; in spring the one-in-ten date for 28°F is March 19, 16 days before the 32°F one. The freeze-free season lasts 245 days in a typical year, shorter than at 53% of the 339 Texas stations; it reaches 271 days one year in ten and falls short of 217 one year in ten. On average 49 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 16 days longer, to about March 31, and return around November 4. Nights of 24°F, cold enough to damage hardier plants, come in 98% of winters and 16°F in 45%.

July is the warmest month at Sulphur Springs, TX, averaging 94°F by day and 74°F at night; January is the coldest at 55°F and 34°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 80% of years and April still brings one in 15% of years.

Warmth for growing adds up to 6,139 growing degree days a year (base 50°F), fewer than at 64% of the 351 Texas stations. 39% of them (2,408) have built up by the end of June, and July adds the most, 1,055. Precipitation totals 46.5 inches a year, most in October (4.9") and least in August (2.9"); May to September bring 38% of it.

The nearest other station, Greenville Kgvl Radio, TX, 16 miles west of Cumby, has a last frost 3 days later (March 18), a first frost 2 days later (November 16), a season 1 day shorter.

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Sulphur Springs, TX, 11.1 miles away, so there is no typical first-snow date to plan around.

ZIP 75433 is 11 miles from Sulphur Springs, TX, which stands at 495 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 75482 (Sulphur Springs). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75433 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°C) over 1991–2020; a zone describes winter lows, not frost dates.