Union, NE 68455 Frost Dates
Frost dates for Union, NE, ZIP 68455
Around 04/18 is the usual last spring frost, about 233 days away. The first fall frost typically arrives around 10/19, about 182 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Union, not a forecast for this year.
What to do before the first frost
Zone 5b around Union has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Union compares
About 182 days separate Union's last and first frost, putting it 24,335 of 40,283 ZIP codes nationally. Within NE, it ranks 45 of 605.
Learn more
zone vs. frost date explains why Zone 5b and Union's frost date answer different questions, and the frost range explains how to read the range around Union's dates instead of trusting one.