Frost Dates for 67550 — Larned, Kansas

Half of springs at Larned, KS see their last 32°F night by April 16; only one in ten is past it by April 3, and one in ten still has one after April 30. Planting tender crops after April 22 leaves a 30% risk of a frost on them, after April 26 20%, and after April 30 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 27 in half of years, as early as October 12 one year in ten, and holds off past November 9 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 22, 8 days before the 32°F one. The freeze-free season lasts 190 days in a typical year, longer than at 57% of the 110 Kansas stations; it reaches 209 days one year in ten and falls short of 170 one year in ten. On average 122 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 27, and return around October 17. Severe cold of 16°F or below comes every winter, usually between December 2 and March 2.

July is the warmest month at Larned, KS, averaging 91°F by day and 67°F at night; January is the coldest at 44°F and 21°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month.

Warmth for growing adds up to 4,115 growing degree days a year (base 50°F), more than at 55% of the 110 Kansas stations. 35% of them (1,431) have built up by the end of June, and July adds the most, 906. Precipitation totals 27.2 inches a year, most in June (4.2") and least in January (0.7"); May to September bring 65% of it.

The nearest other station, Great Bend 3W, KS, 21 miles northeast of Larned, has a last frost 8 days later (April 24), a first frost 12 days earlier (October 15), a season 18 days shorter.

The first measurable snow (0.1 inch or more) in Larned usually arrives around December 7, and the last of the season around March 4. Those are the middle dates across the winters of 1991–2020 at Larned, KS, 1.5 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 43 days after the last snow.

ZIP 67550 is 2 miles from Larned, KS, which stands at 1,995 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 67550 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.