Frost Dates in Texas

At the middle station of the 315 in Texas where a freeze comes every year, the last spring frost (50%) is March 15 and the first fall frost November 16, a freeze-free season of 245 days. The last frost is earliest at League City (Houston NWSO, TX, January 31) and latest at Dalhart (Dalhart, TX, April 28), 87 days apart. The season runs from 173 days at Dalhart to 327 at Houston.

At 12 of the 350 stations a 32°F night comes in fewer than half of winters. Where a freeze does come, it is rarest at South Padre Island (9% of winters), Mcallen (29% of winters) and Corpus Christi (31% of winters).

251 of these stations were also in NOAA's previous normals, for 1981–2010. Between the two, the median station's freeze-free season grew 2 days longer, with the last spring frost 2 days earlier and the first fall frost 1 day earlier; the season lengthened at 145 stations and shortened at 89. The two periods share twenty years, so the change reflects mostly 2011–2020 against 1981–1990.