St. Helena, NE 68774 Frost Dates
Frost dates for St. Helena, NE, ZIP 68774
Typically, the last spring freeze lands around 04/27, roughly 242 days out. The first fall frost typically arrives around 10/11, about 164 frost-free days later.
St. Helena sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 5a around St. Helena has about 6 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 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Helena compares
St. Helena's growing season runs about 164 days, ranking 31,253 of 40,283 US ZIP codes measured here, longest to shortest. Within NE, it ranks 332 of 605.
Learn more
local microclimates explains what one yard in St. Helena can differ from the 68774 normal, and zone vs. frost date explains why Zone 5a and St. Helena's frost date answer different questions.