Frost Dates for 68355 — Falls City, Nebraska

Half of springs at Falls City Brenner Field, NE see their last 32°F night by April 18; only one in ten is past it by April 4, 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 wider than at 72% of the 68 Nebraska stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 17 in half of years, as early as October 1 one year in ten, and holds off past October 30 one year in ten. A hard freeze of 28°F follows 9 days later, around October 26; in spring the one-in-ten date for 28°F is April 23, 9 days before the 32°F one. The freeze-free season lasts 180 days in a typical year, longer than at 91% of the 68 Nebraska stations; it reaches 200 days one year in ten and falls short of 157 one year in ten. On average 131 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 28, and return around October 7. Severe cold of 16°F or below comes every winter, usually between November 24 and March 8.

July is the warmest month at Falls City Brenner Field, NE, averaging 88°F by day and 66°F at night; January is the coldest at 36°F and 17°F. A freezing night is all but certain in every month from October 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 14% of years.

Warmth for growing adds up to 3,775 growing degree days a year (base 50°F), more than at 99% of the 68 Nebraska stations. 37% of them (1,389) have built up by the end of June, and July adds the most, 843. Precipitation totals 34.6 inches a year, most in July (5.2") and least in January (0.6"); May to September bring 63% of it.

The nearest other station, Hiawatha 1 S, KS, 18 miles south of Falls City, has a last frost 4 days earlier (April 14), a first frost 5 days later (October 22), a season 8 days longer.

The first measurable snow (0.1 inch or more) in Falls City usually arrives around December 5, and the last of the season around March 16. Those are the middle dates across the winters of 1991–2020 at Rulo 2W, NE, 7.1 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 33 days after the last snow.

ZIP 68355 is 1 mile from Falls City Brenner Field, NE, which stands at 980 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 68355 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°C) over 1991–2020; a zone describes winter lows, not frost dates.