Frost Dates for 67146 — Udall, Kansas

Half of springs at Winfield 3NE, KS 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 wider than at 57% of the 110 Kansas stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 22 in half of years, as early as October 7 one year in ten, and holds off past November 3 one year in ten. A hard freeze of 28°F follows 10 days later, around November 1; in spring the one-in-ten date for 28°F is April 22, 9 days before the 32°F one. The freeze-free season lasts 189 days in a typical year, longer than at 53% of the 110 Kansas stations; it reaches 210 days one year in ten and falls short of 167 one year in ten. On average 108 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 10 days longer, to about April 26, and return around October 13. Severe cold of 16°F or below comes every winter, usually between November 28 and March 3.

July is the warmest month at Winfield 3NE, KS, averaging 91°F by day and 68°F at night; January is the coldest at 44°F and 20°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 86% of years and May still brings one in 12% of years.

Warmth for growing adds up to 4,270 growing degree days a year (base 50°F), more than at 70% of the 110 Kansas stations. 36% of them (1,528) have built up by the end of June, and July adds the most, 919. Precipitation totals 40.7 inches a year, most in May (6.0") and least in January (1.1"); May to September bring 58% of it.

The nearest other station, Haysville 3SE, KS, 14 miles northwest of Udall, has a last frost 2 days earlier (April 14), the same first-frost date.

The first measurable snow (0.1 inch or more) in Udall usually arrives around December 19, and the last of the season around February 25. Those are the middle dates across the winters of 1991–2020 at Rock 3 SW, KS, 3.4 miles away: half of years saw snow earlier, half later. Snow fell in 94% of those winters. The last 32°F night of spring typically comes 50 days after the last snow.

ZIP 67146 is 12 miles from Winfield 3NE, KS, which stands at 1,233 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 67156 (Winfield). The 2023 USDA Plant Hardiness Zone Map lists ZIP 67146 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.