Frost Dates for 79040 — Gruver, Texas

Half of springs at Gruver, TX see their last 32°F night by April 21; only one in ten is past it by April 7, and one in ten still has one after May 4. Planting tender crops after April 27 leaves a 30% risk of a frost on them, after April 30 20%, and after May 4 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 98% of the 339 Texas stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 23 in half of years, as early as October 8 one year in ten, and holds off past November 3 one year in ten. A hard freeze of 28°F follows 9 days later, around November 1; in spring the one-in-ten date for 28°F is April 27, 7 days before the 32°F one. The freeze-free season lasts 182 days in a typical year, shorter than at 99% of the 339 Texas stations; it reaches 201 days one year in ten and falls short of 163 one year in ten. On average 131 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 9 days longer, to about April 30, and return around October 13. Severe cold of 16°F or below comes every winter, usually between November 25 and March 4.

July is the warmest month at Gruver, TX, averaging 93°F by day and 65°F at night; January is the coldest at 49°F and 20°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 16% of years.

Warmth for growing adds up to 4,152 growing degree days a year (base 50°F), fewer than at 98% of the 351 Texas stations. 36% of them (1,491) have built up by the end of June, and July adds the most, 900. Precipitation totals 20.7 inches a year, most in June (3.3") and least in February (0.5"); May to September bring 62% of it.

The nearest other station, Spearman, TX, 18 miles east of Gruver, has a last frost 13 days earlier (April 8), a first frost 12 days later (November 4), a season 27 days longer.

The first measurable snow (0.1 inch or more) in Gruver usually arrives around November 30, and the last of the season around March 3. Those are the middle dates across the winters of 1991–2020 at Gruver, TX, 5 miles away: half of years saw snow earlier, half later. Snow fell in 88% of those winters. The last 32°F night of spring typically comes 49 days after the last snow.

ZIP 79040 is 5 miles from Gruver, TX, which stands at 3,170 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 79040 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.