Frost Dates for 68450 — Tecumseh, Nebraska

Half of springs at Tecumseh 1S, NE see their last 32°F night by April 26; only one in ten is past it by April 12, and one in ten still has one after May 11. Planting tender crops after May 1 leaves a 30% risk of a frost on them, after May 5 20%, and after May 11 10%. The 15 days between the even-odds date and the one-in-ten date is wider than at 90% of the 68 Nebraska stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 10 in half of years, as early as September 25 one year in ten, and holds off past October 23 one year in ten. A hard freeze of 28°F follows 10 days later, around October 20; in spring the one-in-ten date for 28°F is April 30, 11 days before the 32°F one. The freeze-free season lasts 164 days in a typical year, shorter than at 50% of the 68 Nebraska stations; it reaches 183 days one year in ten and falls short of 145 one year in ten. On average 144 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 9 days longer, to about May 5, and return around September 30. Severe cold of 16°F or below comes every winter, usually between November 16 and March 15.

July is the warmest month at Tecumseh 1S, NE, averaging 88°F by day and 65°F at night; January is the coldest at 35°F and 13°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 32% of years.

Warmth for growing adds up to 3,502 growing degree days a year (base 50°F), more than at 82% of the 68 Nebraska stations. 35% of them (1,234) have built up by the end of June, and July adds the most, 820. Precipitation totals 32.4 inches a year, most in May (5.3") and least in January (0.8"); May to September bring 62% of it.

The nearest other station, Syracuse, NE, 20 miles north of Tecumseh, has a last frost 1 day earlier (April 25), a first frost 1 day later (October 11), a season 4 days longer.

The first measurable snow (0.1 inch or more) in Tecumseh usually arrives around November 28, and the last of the season around March 15. Those are the middle dates across the winters of 1991–2020 at Tecumseh 1S, NE, 1.6 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 42 days after the last snow.

ZIP 68450 is 2 miles from Tecumseh 1S, NE, which stands at 1,110 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 68450 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.