Frost Dates for 67045 — Eureka, Kansas

Half of springs at Eureka 1E, KS see their last 32°F night by April 16; only one in ten is past it by April 1, and one in ten still has one after May 1. Planting tender crops after April 22 leaves a 30% risk of a frost on them, after April 26 20%, and after May 1 10%. The 15 days between the even-odds date and the one-in-ten date is wider than at 57% of the 110 Kansas stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 20 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 10 days later, around October 30; in spring the one-in-ten date for 28°F is April 21, 10 days before the 32°F one. The freeze-free season lasts 186 days in a typical year, shorter than at 55% of the 110 Kansas stations; it reaches 205 days one year in ten and falls short of 166 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 26, and return around October 12. Severe cold of 16°F or below comes every winter, usually between November 28 and March 5.

July is the warmest month at Eureka 1E, KS, averaging 90°F by day and 67°F at night; January is the coldest at 43°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 10% of years.

Warmth for growing adds up to 4,078 growing degree days a year (base 50°F), fewer than at 54% of the 110 Kansas stations. 35% of them (1,444) have built up by the end of June, and July adds the most, 891. Precipitation totals 40.1 inches a year, most in May (6.0") and least in January (1.0"); May to September bring 60% of it.

The nearest other station, El Dorado, KS, 28 miles west of Eureka and 190 feet higher, has a last frost 3 days earlier (April 13), a first frost 5 days later (October 25), a season 7 days longer.

The first measurable snow (0.1 inch or more) in Eureka usually arrives around December 6, and the last of the season around February 24. Those are the middle dates across the winters of 1991–2020 at Eureka 1E, KS, 3.8 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 51 days after the last snow.

ZIP 67045 is 4 miles from Eureka 1E, KS, which stands at 1,100 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 67045 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.