Frost Dates for 74941 — Keota, Oklahoma

Half of springs at Mc Curtain 1 SE, OK see their last 32°F night by March 23; only one in ten is past it by March 2, and one in ten still has one after April 10. Planting tender crops after April 1 leaves a 30% risk of a frost on them, after April 5 20%, and after April 10 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 60% 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 21 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 16; in spring the one-in-ten date for 28°F is March 30, 11 days before the 32°F one. The freeze-free season lasts 228 days in a typical year, longer than at 93% of the 114 Oklahoma stations; it reaches 255 days one year in ten and falls short of 203 one year in ten. On average 60 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 April 5, and return around October 28. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 85%.

July is the warmest month at Mc Curtain 1 SE, OK, averaging 94°F by day and 73°F at night; January is the coldest at 52°F and 32°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 88% of years and April still brings one in 30% of years.

Warmth for growing adds up to 5,633 growing degree days a year (base 50°F), more than at 94% of the 114 Oklahoma stations. 39% of them (2,189) have built up by the end of June, and July adds the most, 1,026.

The nearest other station, Sallisaw 2 NW, OK, 14 miles north of Keota, has a last frost 7 days later (March 30), a first frost 2 days later (November 7), a season 5 days shorter.

Measurable snow is rare here: only 9 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Sallisaw 2 NW, OK, 13.7 miles away, so there is no typical first-snow date to plan around.

ZIP 74941 is 10 miles from Mc Curtain 1 SE, OK, which stands at 655 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 74462 (Stigler). The 2023 USDA Plant Hardiness Zone Map lists ZIP 74941 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.