Frost Dates for 66901 — Concordia, Kansas

Half of springs at Concordia Municipal Airport, 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 25 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 19 in half of years, as early as October 3 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 10 days later, around October 29; in spring the one-in-ten date for 28°F is April 22, 10 days before the 32°F one. The freeze-free season lasts 183 days in a typical year, shorter than at 63% of the 110 Kansas stations; it reaches 203 days one year in ten and falls short of 162 one year in ten. On average 121 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 29, and return around October 10. Severe cold of 16°F or below comes every winter, usually between November 26 and March 9.

July is the warmest month at Concordia Municipal Airport, KS, averaging 90°F by day and 67°F at night; January is the coldest at 39°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 13% of years.

Warmth for growing adds up to 3,939 growing degree days a year (base 50°F), fewer than at 71% of the 110 Kansas stations. 35% of them (1,396) have built up by the end of June, and July adds the most, 894. Precipitation totals 28.4 inches a year, most in May (4.3") and least in January (0.7"); May to September bring 65% of it.

The nearest other station, Belleville, KS, 17 miles north of Concordia, has a last frost 4 days later (April 22), a first frost 2 days earlier (October 17), a season 8 days shorter.

The first measurable snow (0.1 inch or more) in Concordia usually arrives around November 24, and the last of the season around March 20. Those are the middle dates across the winters of 1991–2020 at Concordia Municipal Airport, KS, 1.2 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 29 days after the last snow.

ZIP 66901 is 1 mile from Concordia Municipal Airport, KS, which stands at 1,469 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 66901 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.