Frost Dates for 67056 — Halstead, Kansas

Half of springs at Newton, KS see their last 32°F night by April 14; only one in ten is past it by March 31, and one in ten still has one after April 27. Planting tender crops after April 20 leaves a 30% risk of a frost on them, after April 23 20%, and after April 27 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 65% of the 110 Kansas stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 25 in half of years, as early as October 12 one year in ten, and holds off past November 7 one year in ten. A hard freeze of 28°F follows 9 days later, around November 3; in spring the one-in-ten date for 28°F is April 20, 7 days before the 32°F one. The freeze-free season lasts 193 days in a typical year, longer than at 66% of the 110 Kansas stations; it reaches 213 days one year in ten and falls short of 173 one year in ten. On average 115 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 24, and return around October 16. Severe cold of 16°F or below comes every winter, usually between December 1 and March 2.

July is the warmest month at Newton, KS, averaging 92°F by day and 70°F at night; January is the coldest at 42°F and 20°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 89% of years.

Warmth for growing adds up to 4,379 growing degree days a year (base 50°F), more than at 81% of the 110 Kansas stations. 36% of them (1,557) have built up by the end of June, and July adds the most, 958. Precipitation totals 33.9 inches a year, most in June (5.0") and least in January (0.8"); May to September bring 62% of it.

The nearest other station, Hutchinson Municipal Airport, KS, 19 miles west of Halstead, has a last frost 7 days later (April 21), a first frost 7 days earlier (October 18), a season 13 days shorter.

The first measurable snow (0.1 inch or more) in Halstead usually arrives around December 6, and the last of the season around March 3. Those are the middle dates across the winters of 1991–2020 at Newton, KS, 8.7 miles away: half of years saw snow earlier, half later. Snow fell in 88% of those winters. The last 32°F night of spring typically comes 42 days after the last snow.

ZIP 67056 is 9 miles from Newton, KS, which stands at 1,441 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 67114 (Newton). The 2023 USDA Plant Hardiness Zone Map lists ZIP 67056 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.