Frost Dates for 68767 — Pierce, Nebraska

Half of springs at Osmond, NE see their last 32°F night by April 30; only one in ten is past it by April 16, and one in ten still has one after May 12. Planting tender crops after May 5 leaves a 30% risk of a frost on them, after May 7 20%, and after May 12 10%. The 12 days between the even-odds date and the one-in-ten date is narrower than at 57% of the 68 Nebraska stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 6 in half of years, as early as September 23 one year in ten, and holds off past October 19 one year in ten. A hard freeze of 28°F follows 11 days later, around October 17; in spring the one-in-ten date for 28°F is May 2, 10 days before the 32°F one. The freeze-free season lasts 160 days in a typical year, shorter than at 66% of the 68 Nebraska stations; it reaches 179 days one year in ten and falls short of 141 one year in ten. On average 158 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 8 days longer, to about May 8, and return around September 29. Severe cold of 16°F or below comes every winter, usually between November 9 and March 24.

July is the warmest month at Osmond, NE, averaging 86°F by day and 63°F at night; January is the coldest at 31°F and 10°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 47% of years.

Warmth for growing adds up to 3,026 growing degree days a year (base 50°F), fewer than at 76% of the 68 Nebraska stations. 34% of them (1,025) have built up by the end of June, and July adds the most, 762. Precipitation totals 27.5 inches a year, most in May (4.0") and least in January (0.6"); May to September bring 64% of it.

The nearest other station, Norfolk Karl Stefan Airport, NE, 16 miles south of Pierce, has the same 50% last-frost date, a first frost 1 day earlier (October 5), a season 3 days shorter.

The first measurable snow (0.1 inch or more) in Pierce usually arrives around November 14, and the last of the season around March 31. Those are the middle dates across the winters of 1991–2020 at Pierce, NE, 1.3 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 30 days after the last snow.

ZIP 68767 is 11 miles from Osmond, NE, which stands at 1,650 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 68767 in zone 5a, the band where the coldest night of the year averaged -20 to -15°F (-28.9 to -26.1°C) over 1991–2020; a zone describes winter lows, not frost dates.