Frost Dates for 74401 — Muskogee, Oklahoma

Half of springs at Muskogee, OK see their last 32°F night by April 7; only one in ten is past it by March 20, and one in ten still has one after April 26. Planting tender crops after April 15 leaves a 30% risk of a frost on them, after April 20 20%, and after April 26 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 October 30 in half of years, as early as October 16 one year in ten, and holds off past November 13 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 11, 15 days before the 32°F one. The freeze-free season lasts 208 days in a typical year, shorter than at 62% of the 114 Oklahoma stations; it reaches 232 days one year in ten and falls short of 185 one year in ten. On average 79 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 18, and return around October 23. Severe cold of 16°F or below comes in 99% of winters, usually between December 15 and February 19.

July is the warmest month at Muskogee, OK, averaging 93°F by day and 72°F at night; January is the coldest at 49°F and 26°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 65% of years.

Warmth for growing adds up to 5,125 growing degree days a year (base 50°F), fewer than at 52% of the 114 Oklahoma stations. 38% of them (1,938) have built up by the end of June, and July adds the most, 1,000. Precipitation totals 43.2 inches a year, most in May (5.3") and least in January (1.9"); May to September bring 49% of it.

The nearest other station, Muskogee Davis Field, OK, 6 miles southeast of Muskogee, has a last frost 5 days earlier (April 2), a first frost 3 days later (November 2), a season 8 days longer.

The first measurable snow (0.1 inch or more) in Muskogee usually arrives around December 23, and the last of the season around February 3. Those are the middle dates across the winters of 1991–2020 at Muskogee, OK, 4.9 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 63 days after the last snow.

ZIP 74401 is 5 miles from Muskogee, OK, which stands at 518 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 74403 (Muskogee). The 2023 USDA Plant Hardiness Zone Map lists ZIP 74401 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.