Frost Dates for 67039 — Douglass, Kansas

Half of springs at Smileyberg 1N, KS see their last 32°F night by April 18; only one in ten is past it by April 3, and one in ten still has one after May 2. Planting tender crops after April 24 leaves a 30% risk of a frost on them, after April 28 20%, and after May 2 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 44% of the 110 Kansas stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 21 in half of years, as early as October 5 one year in ten, and holds off past November 4 one year in ten. A hard freeze of 28°F follows 10 days later, around October 31; in spring the one-in-ten date for 28°F is April 23, 9 days before the 32°F one. The freeze-free season lasts 185 days in a typical year, shorter than at 58% of the 110 Kansas stations; it reaches 206 days one year in ten and falls short of 165 one year in ten. On average 118 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 28, and return around October 11. Severe cold of 16°F or below comes every winter, usually between November 27 and March 6.

July is the warmest month at Smileyberg 1N, KS, averaging 89°F by day and 67°F at night; January is the coldest at 42°F and 19°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 15% of years.

Warmth for growing adds up to 3,960 growing degree days a year (base 50°F), fewer than at 70% of the 110 Kansas stations. 35% of them (1,393) have built up by the end of June, and July adds the most, 873. Precipitation totals 39.1 inches a year, most in May (6.2") and least in January (0.9"); May to September bring 62% of it.

The nearest other station, Winfield 3NE, KS, 16 miles south of Douglass, has a last frost 2 days earlier (April 16), a first frost 1 day later (October 22), a season 4 days longer.

The first measurable snow (0.1 inch or more) in Douglass usually arrives around December 5, and the last of the season around March 4. Those are the middle dates across the winters of 1991–2020 at Smileyberg 1N, KS, 6.6 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 45 days after the last snow.

ZIP 67039 is 7 miles from Smileyberg 1N, KS, which stands at 1,330 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 67010 (Augusta). The 2023 USDA Plant Hardiness Zone Map lists ZIP 67039 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.