Frost Dates for 75479 — Savoy, Texas

Half of springs at Bonham 3NNE, TX see their last 32°F night by March 16; only one in ten is past it by February 28, and one in ten still has one after April 4. Planting tender crops after March 25 leaves a 30% risk of a frost on them, after March 31 20%, and after April 4 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 29 one year in ten, and holds off past December 1 one year in ten. A hard freeze of 28°F follows 11 days later, around November 24; in spring the one-in-ten date for 28°F is March 22, 13 days before the 32°F one. The freeze-free season lasts 242 days in a typical year, shorter than at 58% of the 339 Texas stations; it reaches 268 days one year in ten and falls short of 215 one year in ten. On average 55 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 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 61%.

July is the warmest month at Bonham 3NNE, TX, averaging 94°F by day and 73°F at night; January is the coldest at 53°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 87% of years and April still brings one in 16% of years.

Warmth for growing adds up to 5,764 growing degree days a year (base 50°F), fewer than at 83% of the 351 Texas stations. 39% of them (2,219) have built up by the end of June, and July adds the most, 1,038. Precipitation totals 45.6 inches a year, most in May (4.9") and least in January (2.8"); May to September bring 43% of it.

The nearest other station, Sherman, TX, 18 miles west of Savoy and 168 feet higher, has a last frost 2 days earlier (March 14), a first frost 6 days later (November 19), a season 8 days longer.

Measurable snow is rare here: only 6 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Bonham 3NNE, TX, 10.4 miles away, so there is no typical first-snow date to plan around.

ZIP 75479 is 10 miles from Bonham 3NNE, TX, which stands at 592 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 75418 (Bonham). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75479 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.