Frost Dates for 74352 — Locust Grove, Oklahoma

Half of springs at Pryor, OK see their last 32°F night by April 5; only one in ten is past it by March 19, and one in ten still has one after April 21. Planting tender crops after April 11 leaves a 30% risk of a frost on them, after April 15 20%, and after April 21 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 61% 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 14 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 8, 13 days before the 32°F one. The freeze-free season lasts 207 days in a typical year, shorter than at 68% of the 114 Oklahoma stations; it reaches 230 days one year in ten and falls short of 185 one year in ten. On average 95 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 17, and return around October 21. Severe cold of 16°F or below comes every winter, usually between December 16 and February 16.

July is the warmest month at Pryor, OK, averaging 91°F by day and 70°F at night; January is the coldest at 47°F and 25°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 64% of years.

Warmth for growing adds up to 4,741 growing degree days a year (base 50°F), fewer than at 90% of the 114 Oklahoma stations. 37% of them (1,754) have built up by the end of June, and July adds the most, 942. Precipitation totals 44.8 inches a year, most in May (5.5") and least in January (2.0"); May to September bring 51% of it.

The nearest other station, Wagoner, OK, 17 miles southwest of Locust Grove, has a last frost 7 days earlier (March 29), a first frost 6 days later (November 5), a season 16 days longer.

The first measurable snow (0.1 inch or more) in Locust Grove usually arrives around January 8, and the last of the season around February 9. Those are the middle dates across the winters of 1991–2020 at Spavinaw, OK, 17.7 miles away: half of years saw snow earlier, half later. Snow fell in 88% of those winters. The last 32°F night of spring typically comes 55 days after the last snow.

ZIP 74352 is 14 miles from Pryor, OK, which stands at 625 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 74361 (Pryor). The 2023 USDA Plant Hardiness Zone Map lists ZIP 74352 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.