Frost Dates for 74053 — Oologah, Oklahoma

Half of springs at Claremore 2 ENE, OK see their last 32°F night by April 7; only one in ten is past it by March 20, and one in ten still has one after April 24. Planting tender crops after April 14 leaves a 30% risk of a frost on them, after April 18 20%, and after April 24 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 October 30 in half of years, as early as October 15 one year in ten, and holds off past November 13 one year in ten. A hard freeze of 28°F follows 9 days later, around November 8; in spring the one-in-ten date for 28°F is April 11, 13 days before the 32°F one. The freeze-free season lasts 205 days in a typical year, shorter than at 76% of the 114 Oklahoma stations; it reaches 229 days one year in ten and falls short of 182 one year in ten. On average 94 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 11 days longer, to about April 18, and return around October 21. Severe cold of 16°F or below comes every winter, usually between December 14 and February 18.

July is the warmest month at Claremore 2 ENE, OK, averaging 92°F by day and 70°F at night; January is the coldest at 47°F and 24°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 67% of years.

Warmth for growing adds up to 4,778 growing degree days a year (base 50°F), fewer than at 89% of the 114 Oklahoma stations. 37% of them (1,759) have built up by the end of June, and July adds the most, 959. Precipitation totals 46.1 inches a year, most in May (6.1") and least in January (1.8"); May to September bring 51% of it.

The nearest other station, Nowata, OK, 18 miles north of Oologah, has a last frost 3 days earlier (April 4), a first frost 2 days later (November 1), a season 5 days longer.

The first measurable snow (0.1 inch or more) in Oologah usually arrives around December 16, and the last of the season around February 6. Those are the middle dates across the winters of 1991–2020 at Claremore 2 ENE, OK, 10.7 miles away: half of years saw snow earlier, half later. Snow fell in 79% of those winters. The last 32°F night of spring typically comes 60 days after the last snow.

ZIP 74053 is 11 miles from Claremore 2 ENE, OK, which stands at 588 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 74017 (Claremore). The 2023 USDA Plant Hardiness Zone Map lists ZIP 74053 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.