Frost Dates for 76034 — Colleyville, Texas

Half of springs at Grapevine Dam, TX see their last 32°F night by March 14; only one in ten is past it by February 23, and one in ten still has one after April 3. Planting tender crops after March 23 leaves a 30% risk of a frost on them, after March 29 20%, and after April 3 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 17 in half of years, as early as November 2 one year in ten, and holds off past December 4 one year in ten. A hard freeze of 28°F follows 12 days later, around November 29; in spring the one-in-ten date for 28°F is March 20, 14 days before the 32°F one. The freeze-free season lasts 249 days in a typical year, longer than at 50% of the 339 Texas stations; it reaches 275 days one year in ten and falls short of 223 one year in ten. On average 44 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 15 days longer, to about March 29, and return around November 7. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 42%.

August is the warmest month at Grapevine Dam, TX, averaging 96°F by day and 74°F at night; January is the coldest at 56°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 October the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 77% of years and April still brings one in 13% of years.

Warmth for growing adds up to 6,289 growing degree days a year (base 50°F), fewer than at 54% of the 351 Texas stations. 39% of them (2,483) have built up by the end of June, and August adds the most, 1,079. Precipitation totals 39.0 inches a year, most in May (4.7") and least in August (2.1"); May to September bring 42% of it.

The nearest other station, Dallas Fort Worth Airport, TX, 8 miles east of Colleyville, has a last frost 6 days earlier (March 8), a first frost 7 days later (November 24), a season 13 days longer.

Measurable snow is rare here: only 1 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Grapevine Dam, TX, 7.1 miles away, so there is no typical first-snow date to plan around.

ZIP 76034 is 7 miles from Grapevine Dam, TX, which stands at 585 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 8 other ZIP codes share the station; its figures are presented in full for 75067 (Lewisville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 76034 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.