Frost Dates for 67005 — Arkansas City, Kansas

Half of springs at Winfield Strother Field Airport, KS see their last 32°F night by April 11; only one in ten is past it by March 26, and one in ten still has one after April 28. Planting tender crops after April 18 leaves a 30% risk of a frost on them, after April 23 20%, and after April 28 10%. The 17 days between the even-odds date and the one-in-ten date is wider than at 85% of the 110 Kansas stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 27 in half of years, as early as October 12 one year in ten, and holds off past November 10 one year in ten. A hard freeze of 28°F follows 9 days later, around November 5; in spring the one-in-ten date for 28°F is April 17, 11 days before the 32°F one. The freeze-free season lasts 197 days in a typical year, longer than at 75% of the 110 Kansas stations; it reaches 220 days one year in ten and falls short of 176 one year in ten. On average 96 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 13 days longer, to about April 24, and return around October 18. Severe cold of 16°F or below comes every winter, usually between December 5 and February 27.

July is the warmest month at Winfield Strother Field Airport, KS, averaging 92°F by day and 71°F at night; January is the coldest at 46°F and 24°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 75% of years.

Warmth for growing adds up to 4,679 growing degree days a year (base 50°F), the most of the 110 Kansas stations. 37% of them (1,719) have built up by the end of June, and July adds the most, 967. Precipitation totals 35.0 inches a year, most in June (5.3") and least in January (0.7"); May to September bring 59% of it.

The nearest other station, Newkirk 5NE, OK, 9 miles south of Arkansas City, has a last frost 5 days later (April 16), a first frost 1 day earlier (October 26), a season 5 days shorter.

The first measurable snow (0.1 inch or more) in Arkansas City usually arrives around December 17, and the last of the season around March 1. Those are the middle dates across the winters of 1991–2020 at Newkirk 5NE, OK, 8.7 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 41 days after the last snow.

ZIP 67005 is 7 miles from Winfield Strother Field Airport, KS, which stands at 1,150 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 67005 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.