Frost Dates for 67877 — Sublette, Kansas

Half of springs at Sublette 7WSW, KS see their last 32°F night by April 23; only one in ten is past it by April 7, and one in ten still has one after May 5. Planting tender crops after April 29 leaves a 30% risk of a frost on them, after May 2 20%, and after May 5 10%. The 12 days between the even-odds date and the one-in-ten date is narrower than at 89% 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 2 one year in ten. A hard freeze of 28°F follows 8 days later, around October 29; in spring the one-in-ten date for 28°F is April 28, 7 days before the 32°F one. The freeze-free season lasts 179 days in a typical year, shorter than at 75% of the 110 Kansas stations; it reaches 201 days one year in ten and falls short of 160 one year in ten. On average 133 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 8 days longer, to about May 1, and return around October 11. Severe cold of 16°F or below comes every winter, usually between November 25 and March 6.

July is the warmest month at Sublette 7WSW, KS, averaging 94°F by day and 65°F at night; January is the coldest at 49°F and 20°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 24% of years.

Warmth for growing adds up to 4,296 growing degree days a year (base 50°F), more than at 74% of the 110 Kansas stations. 36% of them (1,561) have built up by the end of June, and July adds the most, 916. Precipitation totals 18.3 inches a year, most in June (3.0") and least in January (0.4"); May to September bring 66% of it.

The nearest other station, Ulysses 3NE, KS, 25 miles west of Sublette, has a last frost 5 days later (April 28), a first frost 5 days earlier (October 16), a season 8 days shorter.

The first measurable snow (0.1 inch or more) in Sublette usually arrives around December 6, and the last of the season around March 23. Those are the middle dates across the winters of 1991–2020 at Sublette 7WSW, KS, 9.4 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 31 days after the last snow.

ZIP 67877 is 9 miles from Sublette 7WSW, KS, which stands at 2,949 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 67877 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.