Frost Dates for 68446 — Syracuse, Nebraska

Half of springs at Syracuse, NE see their last 32°F night by April 25; only one in ten is past it by April 12, and one in ten still has one after May 7. Planting tender crops after April 30 leaves a 30% risk of a frost on them, after May 3 20%, and after May 7 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 11 in half of years, as early as September 25 one year in ten, and holds off past October 24 one year in ten. A hard freeze of 28°F follows 11 days later, around October 22; in spring the one-in-ten date for 28°F is April 29, 8 days before the 32°F one. The freeze-free season lasts 168 days in a typical year, longer than at 57% of the 68 Nebraska stations; it reaches 187 days one year in ten and falls short of 149 one year in ten. On average 147 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 3, and return around October 1. Severe cold of 16°F or below comes every winter, usually between November 17 and March 16.

July is the warmest month at Syracuse, NE, averaging 88°F by day and 65°F at night; January is the coldest at 34°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 27% of years.

Warmth for growing adds up to 3,511 growing degree days a year (base 50°F), more than at 84% of the 68 Nebraska stations. 35% of them (1,232) have built up by the end of June, and July adds the most, 818. Precipitation totals 32.3 inches a year, most in May (5.6") and least in January (0.8"); May to September bring 64% of it.

The nearest other station, Nebraska City 2NW, NE, 16 miles east of Syracuse, has a last frost 7 days earlier (April 18), a first frost 8 days later (October 19), a season 14 days longer.

The first measurable snow (0.1 inch or more) in Syracuse 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 Syracuse, NE, 0.7 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 41 days after the last snow.

ZIP 68446 is under a mile from Syracuse, NE, 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 68446 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.