Frost Dates for 76648 — Hubbard, Texas

Half of springs at Navarro Mills Dam, TX see their last 32°F night by March 13; only one in ten is past it by February 19, and one in ten still has one after April 3. Planting tender crops after March 21 leaves a 30% risk of a frost on them, after March 28 20%, and after April 3 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 14 in half of years, as early as October 30 one year in ten, and holds off past December 6 one year in ten. A hard freeze of 28°F follows 15 days later, around November 29; in spring the one-in-ten date for 28°F is March 19, 15 days before the 32°F one. The freeze-free season lasts 250 days in a typical year, longer than at 52% of the 339 Texas stations; it reaches 278 days one year in ten and falls short of 221 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 13 days longer, to about March 26, and return around November 4. Nights of 24°F, cold enough to damage hardier plants, come in 98% of winters and 16°F in 34%.

August is the warmest month at Navarro Mills Dam, TX, averaging 96°F by day and 73°F at night; January is the coldest at 57°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 72% of years and April still brings one in 14% of years.

Warmth for growing adds up to 6,362 growing degree days a year (base 50°F), fewer than at 51% of the 351 Texas stations. 40% of them (2,535) have built up by the end of June, and August adds the most, 1,069. Precipitation totals 40.4 inches a year, most in October (4.6") and least in July (1.9"); May to September bring 41% of it.

The nearest other station, Hillsboro, TX, 21 miles northwest of Hubbard, has a last frost 8 days later (March 21), a first frost 4 days earlier (November 10), a season 15 days shorter.

Measurable snow is rare here: only 1 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Navarro Mills Dam, TX, 10.9 miles away, so there is no typical first-snow date to plan around.

ZIP 76648 is 11 miles from Navarro Mills Dam, TX, which stands at 454 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 76648 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.