Frost Dates for 75137 — Duncanville, Texas

Half of springs at Joe Pool Lake, TX see their last 32°F night by March 20; only one in ten is past it by February 28, and one in ten still has one after April 8. Planting tender crops after March 29 leaves a 30% risk of a frost on them, after April 1 20%, and after April 8 10%. The 19 days between the even-odds date and the one-in-ten date is narrower than at 63% of the 339 Texas stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 13 in half of years, as early as October 27 one year in ten, and holds off past December 3 one year in ten. A hard freeze of 28°F follows 12 days later, around November 25; in spring the one-in-ten date for 28°F is March 25, 14 days before the 32°F one. The freeze-free season lasts 236 days in a typical year, shorter than at 67% of the 339 Texas stations; it reaches 264 days one year in ten and falls short of 209 one year in ten. On average 52 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 March 31, and return around November 3. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 77%.

August is the warmest month at Joe Pool Lake, TX, averaging 97°F by day and 73°F at night; January is the coldest at 58°F and 33°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 86% of years and April still brings one in 22% of years.

Warmth for growing adds up to 6,315 growing degree days a year (base 50°F), fewer than at 53% of the 351 Texas stations. 39% of them (2,483) have built up by the end of June, and August adds the most, 1,074. Precipitation totals 41.1 inches a year, most in October (5.0") and least in July (2.3"); May to September bring 41% of it.

The nearest other station, Dallas Redbird Airport, TX, 4 miles northeast of Duncanville, has a last frost 14 days earlier (March 6), a first frost 12 days later (November 25), a season 29 days longer.

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Joe Pool Lake, TX, 3.6 miles away, so there is no typical first-snow date to plan around.

ZIP 75137 is 4 miles from Joe Pool Lake, TX, which stands at 591 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 75052 (Grand Prairie). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75137 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.