Frost Dates for 75069 — Mckinney, Texas

Half of springs at Mckinney Municipal Airport, TX see their last 32°F night by March 17; only one in ten is past it by February 27, and one in ten still has one after April 5. Planting tender crops after March 26 leaves a 30% risk of a frost on them, after March 31 20%, and after April 5 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 15 in half of years, as early as October 27 one year in ten, and holds off past December 5 one year in ten. A hard freeze of 28°F follows 15 days later, around November 30; in spring the one-in-ten date for 28°F is March 24, 12 days before the 32°F one. The freeze-free season lasts 241 days in a typical year, shorter than at 60% of the 339 Texas stations; it reaches 268 days one year in ten and falls short of 213 one year in ten. On average 45 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 31, and return around November 3. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 57%.

July is the warmest month at Mckinney Municipal Airport, TX, averaging 94°F by day and 73°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 September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 82% of years and April still brings one in 18% of years.

Warmth for growing adds up to 6,061 growing degree days a year (base 50°F), fewer than at 68% of the 351 Texas stations. 40% of them (2,422) have built up by the end of June, and July adds the most, 1,034.

The nearest other station, Mckinney Municipal Airport, TX, 1 mile southeast of Mckinney, has a last frost 1 day later (March 18), a first frost 4 days earlier (November 11), a season 2 days shorter.

Measurable snow is rare here: only 5 of 16 winters from 1991 to 2020 recorded 0.1 inch or more at Mckinney Municipal Airport, TX, 0.8 miles away, so there is no typical first-snow date to plan around.

ZIP 75069 is under a mile from Mckinney Municipal Airport, TX, which stands at 586 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 75071 (Mckinney). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75069 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.