Frost Dates for 75407 — Princeton, Texas

Half of springs at Mckinney Municipal Airport, TX see their last 32°F night by March 18; only one in ten is past it by February 28, and one in ten still has one after April 7. Planting tender crops after March 27 leaves a 30% risk of a frost on them, after April 2 20%, and after April 7 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 11 in half of years, as early as October 27 one year in ten, and holds off past December 1 one year in ten. A hard freeze of 28°F follows 13 days later, around November 24; in spring the one-in-ten date for 28°F is March 22, 16 days before the 32°F one. The freeze-free season lasts 239 days in a typical year, shorter than at 62% of the 339 Texas stations; it reaches 266 days one year in ten and falls short of 211 one year in ten. On average 48 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 April 3, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 55%.

July is the warmest month at Mckinney Municipal Airport, TX, averaging 95°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 September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 85% of years and April still brings one in 22% of years.

Warmth for growing adds up to 6,146 growing degree days a year (base 50°F), fewer than at 63% of the 351 Texas stations. 40% of them (2,431) have built up by the end of June, and July adds the most, 1,066. Precipitation totals 38.4 inches a year, most in May (4.8") and least in August (1.7"); May to September bring 39% of it.

The nearest other station, Mckinney Municipal Airport, TX, 6 miles northwest of Princeton, has a last frost 1 day earlier (March 17), a first frost 4 days later (November 15), a season 2 days longer.

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, 6.3 miles away, so there is no typical first-snow date to plan around.

ZIP 75407 is 6 miles from Mckinney Municipal Airport, TX, which stands at 580 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 75002 (Allen). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75407 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.