Alliance, NE 69301 Frost Dates
69301, near Alliance, NE: the frost window
Typically, the last spring freeze lands around 05/11, roughly 256 days out. Fall's first freeze usually shows up around 10/03, roughly 144 days after the last spring frost.
Alliance 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.
Stretching the season past the first frost
Alliance's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/11 isn't a guarantee
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Alliance against the rest of the dataset
About 144 days separate Alliance's last and first frost, putting it 36,356 of 40,283 ZIP codes nationally. Within NE, it ranks 558 of 605.
Learn more
Two guides worth reading on 69301: zone vs. frost date, on why Zone 5a and Alliance's frost date answer different questions, and the frost range, on how to read the range around Alliance's dates instead of trusting one.