Frost Dates for 73572 — Walters, Oklahoma

Half of springs at Walters, OK see their last 32°F night by April 1; only one in ten is past it by March 13, and one in ten still has one after April 18. Planting tender crops after April 7 leaves a 30% risk of a frost on them, after April 11 20%, and after April 18 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 41% of the 114 Oklahoma stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 5 in half of years, as early as October 22 one year in ten, and holds off past November 20 one year in ten. A hard freeze of 28°F follows 9 days later, around November 14; in spring the one-in-ten date for 28°F is April 5, 13 days before the 32°F one. The freeze-free season lasts 218 days in a typical year, longer than at 74% of the 114 Oklahoma stations; it reaches 240 days one year in ten and falls short of 195 one year in ten. On average 75 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 13, and return around October 29. Severe cold of 16°F or below comes in 95% of winters, usually between December 24 and February 10.

July is the warmest month at Walters, OK, averaging 97°F by day and 71°F at night; January is the coldest at 53°F and 27°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 51% of years.

Warmth for growing adds up to 5,530 growing degree days a year (base 50°F), more than at 91% of the 114 Oklahoma stations. 38% of them (2,091) have built up by the end of June, and July adds the most, 1,052. Precipitation totals 33.5 inches a year, most in May (4.4") and least in January (1.4"); May to September bring 50% of it.

The nearest other station, Lawton, OK, 18 miles north of Walters, has a last frost 6 days earlier (March 26), a first frost 2 days later (November 7), a season 7 days longer.

The first measurable snow (0.1 inch or more) in Walters usually arrives around December 31, and the last of the season around February 3. Those are the middle dates across the winters of 1991–2020 at Walters, OK, 2.6 miles away: half of years saw snow earlier, half later. Snow fell in 57% of those winters. The last 32°F night of spring typically comes 57 days after the last snow.

ZIP 73572 is 3 miles from Walters, OK, which stands at 1,005 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73572 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.