Frost Dates for 78013 — Comfort, Texas

Half of springs at Kerrville 3 NNE, TX see their last 32°F night by March 27; only one in ten is past it by March 4, and one in ten still has one after April 16. Planting tender crops after April 4 leaves a 30% risk of a frost on them, after April 9 20%, and after April 16 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 7 in half of years, as early as October 23 one year in ten, and holds off past November 26 one year in ten. A hard freeze of 28°F follows 11 days later, around November 18; in spring the one-in-ten date for 28°F is April 5, 11 days before the 32°F one. The freeze-free season lasts 226 days in a typical year, shorter than at 80% of the 339 Texas stations; it reaches 253 days one year in ten and falls short of 199 one year in ten. On average 46 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 12 days longer, to about April 8, and return around October 29. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 61%.

August is the warmest month at Kerrville 3 NNE, TX, averaging 93°F by day and 69°F at night; January is the coldest at 59°F and 34°F. A freezing night is all but certain in every month from November 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 89% of years and April still brings one in 41% of years.

Warmth for growing adds up to 5,887 growing degree days a year (base 50°F), fewer than at 77% of the 351 Texas stations. 41% of them (2,415) have built up by the end of June, and August adds the most, 962. Precipitation totals 30.6 inches a year, most in May (4.3") and least in February (1.6"); May to September bring 50% of it.

The nearest other station, Boerne, TX, 16 miles southeast of Comfort and 352 feet lower, has a last frost 12 days earlier (March 15), a first frost 6 days later (November 13), a season 17 days longer.

Measurable snow is rare here: only 1 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Comfort 2, TX, 1.2 miles away, so there is no typical first-snow date to plan around.

ZIP 78013 is 14 miles from Kerrville 3 NNE, TX, which stands at 1,797 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 78028 (Kerrville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 78013 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.