Niobrara, NE 68760 Frost Dates
Frost dates for Niobrara, NE, ZIP 68760
The last spring frost here typically falls around 04/25, about 240 days from today. The first fall frost typically arrives around 10/13, about 170 frost-free days later.
Zone 5a (-20 to -15°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 Niobrara, not a forecast for this year.
What to do before the first frost
Zone 5a around Niobrara 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.
Why 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Niobrara compares
Niobrara's growing season runs about 170 days, ranking 29,210 of 40,283 US ZIP codes measured here, longest to shortest. Within NE, it ranks 216 of 605.
Learn more
zone vs. frost date explains why Zone 5a and Niobrara's frost date answer different questions, and the frost range explains how to read the range around Niobrara's dates instead of trusting one.