Frost Dates for 75930 — Bronson, Texas

Half of springs at San Augustine, TX see their last 32°F night by March 18; only one in ten is past it by February 26, 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 2 20%, and after April 8 10%. The 21 days between the even-odds date and the one-in-ten date is wider than at 50% of the 339 Texas stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

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 2 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 29, 10 days before the 32°F one. The freeze-free season lasts 240 days in a typical year, shorter than at 61% of the 339 Texas stations; it reaches 268 days one year in ten and falls short of 214 one year in ten. On average 37 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 April 2, and return around November 2. Nights of 24°F, cold enough to damage hardier plants, come in 98% of winters and 16°F in 35%.

August is the warmest month at San Augustine, TX, averaging 94°F by day and 70°F at night; January is the coldest at 60°F and 35°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 80% of years and April still brings one in 24% of years.

Warmth for growing adds up to 6,121 growing degree days a year (base 50°F), fewer than at 66% of the 351 Texas stations. 41% of them (2,492) have built up by the end of June, and August adds the most, 996. Precipitation totals 55.7 inches a year, most in December (5.4") and least in July (3.2"); May to September bring 37% of it.

The nearest other station, Sam Rayburn Dam, TX, 20 miles south of Bronson, has a last frost 22 days earlier (February 24), a first frost 18 days later (December 1), a season 40 days longer.

Measurable snow is rare here: only 1 of 22 winters from 1991 to 2020 recorded 0.1 inch or more at Pineland, TX, 7.4 miles away, so there is no typical first-snow date to plan around.

ZIP 75930 is 14 miles from San Augustine, TX, which stands at 295 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 75972 (San Augustine). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75930 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°C) over 1991–2020; a zone describes winter lows, not frost dates.