Frost Dates for 74538 — Coalgate, Oklahoma

Half of springs at Centrahoma 2 ESE, OK see their last 32°F night by March 31; only one in ten is past it by March 9, 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 10 20%, and after April 18 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 4 in half of years, as early as October 22 one year in ten, and holds off past November 21 one year in ten. A hard freeze of 28°F follows 10 days later, around November 14; in spring the one-in-ten date for 28°F is April 4, 14 days before the 32°F one. The freeze-free season lasts 219 days in a typical year, longer than at 75% of the 114 Oklahoma stations; it reaches 241 days one year in ten and falls short of 198 one year in ten. On average 72 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 11, and return around October 27. Severe cold of 16°F or below comes in 93% of winters, usually between December 26 and February 4.

July is the warmest month at Centrahoma 2 ESE, OK, averaging 92°F by day and 71°F at night; January is the coldest at 51°F and 28°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 50% of years.

Warmth for growing adds up to 5,164 growing degree days a year (base 50°F), more than at 54% of the 114 Oklahoma stations. 38% of them (1,940) have built up by the end of June, and July adds the most, 972. Precipitation totals 45.6 inches a year, most in May (6.0") and least in January (2.4"); May to September bring 47% of it.

The nearest other station, Atoka, OK, 12 miles southeast of Coalgate, has a last frost 5 days later (April 5), a first frost 3 days earlier (November 1), a season 8 days shorter.

The first measurable snow (0.1 inch or more) in Coalgate usually arrives around January 13, and the last of the season around January 27. Those are the middle dates across the winters of 1991–2020 at Lehigh 4 SW, OK, 8.6 miles away: half of years saw snow earlier, half later. Snow fell in 68% of those winters. The last 32°F night of spring typically comes 63 days after the last snow.

ZIP 74538 is 6 miles from Centrahoma 2 ESE, OK, which stands at 710 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 74538 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.