Frost Dates for 74733 — Colbert, Oklahoma

Half of springs at Durant 6SSE Mesonet, OK see their last 32°F night by March 19; only one in ten is past it by March 1, and one in ten still has one after April 7. Planting tender crops after March 27 leaves a 30% risk of a frost on them, after April 1 20%, and after April 7 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 81% of the 114 Oklahoma stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 12 in half of years, as early as October 28 one year in ten, and holds off past December 1 one year in ten. A hard freeze of 28°F follows 12 days later, around November 24; in spring the one-in-ten date for 28°F is March 24, 14 days before the 32°F one. The freeze-free season lasts 237 days in a typical year, longer than at 98% of the 114 Oklahoma stations; it reaches 262 days one year in ten and falls short of 212 one year in ten. On average 48 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 14 days longer, to about April 2, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 64%.

August is the warmest month at Durant 6SSE Mesonet, OK, averaging 94°F by day and 71°F at night; January is the coldest at 53°F and 33°F. A freezing night is all but certain in every month from December 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 21% of years.

Warmth for growing adds up to 5,705 growing degree days a year (base 50°F), more than at 96% of the 114 Oklahoma stations. 39% of them (2,210) have built up by the end of June, and August adds the most, 1,018.

The nearest other station, Sherman, TX, 13 miles southwest of Colbert, has a last frost 5 days earlier (March 14), a first frost 7 days later (November 19), a season 13 days longer.

Measurable snow is rare here: only 7 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Sherman, TX, 12.8 miles away, so there is no typical first-snow date to plan around.

ZIP 74733 is 12 miles from Durant 6SSE Mesonet, OK, which stands at 646 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 74733 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.