Frost Dates for 74342 — Eucha, Oklahoma

Half of springs at Upper Spavinaw Port, OK see their last 32°F night by April 16; only one in ten is past it by March 31, and one in ten still has one after May 1. Planting tender crops after April 23 leaves a 30% risk of a frost on them, after April 27 20%, and after May 1 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 86% of the 114 Oklahoma stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 20 in half of years, as early as October 6 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 10 days later, around October 30; in spring the one-in-ten date for 28°F is April 21, 10 days before the 32°F one. The freeze-free season lasts 187 days in a typical year, the shortest of the 114 Oklahoma stations; it reaches 209 days one year in ten and falls short of 166 one year in ten. On average 102 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 28, and return around October 10. Severe cold of 16°F or below comes every winter, usually between December 5 and February 28.

July is the warmest month at Upper Spavinaw Port, OK, averaging 91°F by day and 67°F at night; January is the coldest at 49°F and 23°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 87% of years and May still brings one in 11% of years.

Warmth for growing adds up to 4,339 growing degree days a year (base 50°F), fewer than at 99% of the 114 Oklahoma stations. 37% of them (1,603) have built up by the end of June, and July adds the most, 897.

The nearest other station, Spavinaw, OK, 8 miles west of Eucha, has a last frost 9 days earlier (April 7), a first frost 13 days later (November 2), a season 22 days longer.

The first measurable snow (0.1 inch or more) in Eucha 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, 7.7 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 66 days after the last snow.

ZIP 74342 is 8 miles from Upper Spavinaw Port, OK, which stands at 795 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 74346 (Jay). The 2023 USDA Plant Hardiness Zone Map lists ZIP 74342 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.