Frost Dates for 73077 — Perry, Oklahoma

Half of springs at Perry, OK see their last 32°F night by April 4; only one in ten is past it by March 20, and one in ten still has one after April 20. Planting tender crops after April 11 leaves a 30% risk of a frost on them, after April 15 20%, and after April 20 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 November 1 in half of years, as early as October 18 one year in ten, and holds off past November 17 one year in ten. A hard freeze of 28°F follows 9 days later, around November 10; in spring the one-in-ten date for 28°F is April 8, 12 days before the 32°F one. The freeze-free season lasts 210 days in a typical year, shorter than at 50% of the 114 Oklahoma stations; it reaches 233 days one year in ten and falls short of 190 one year in ten. On average 80 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 16, and return around October 23. Severe cold of 16°F or below comes every winter, usually between December 18 and February 21.

July is the warmest month at Perry, OK, averaging 95°F by day and 72°F at night; January is the coldest at 49°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 5,191 growing degree days a year (base 50°F), more than at 60% of the 114 Oklahoma stations. 37% of them (1,934) have built up by the end of June, and July adds the most, 1,035. Precipitation totals 36.0 inches a year, most in May (5.2") and least in January (1.3"); May to September bring 54% of it.

The nearest other station, Stillwater Regional Airport, OK, 15 miles southeast of Perry, has a last frost 1 day earlier (April 3), a first frost 1 day earlier (October 31), a season 1 day shorter.

The first measurable snow (0.1 inch or more) in Perry usually arrives around December 31, and the last of the season around February 27. Those are the middle dates across the winters of 1991–2020 at Perry, OK, 1.4 miles away: half of years saw snow earlier, half later. Snow fell in 95% of those winters. The last 32°F night of spring typically comes 36 days after the last snow.

ZIP 73077 is 1 mile from Perry, OK, which stands at 1,025 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73077 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.