Harrison, NE 69346 Frost Dates
69346, near Harrison, NE: the frost window
Around 05/20 is the usual last spring frost, about 265 days away. Fall's first freeze usually shows up around 09/21, roughly 121 days after the last spring frost.
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 Harrison, not a forecast for this year.
Stretching the season past the first frost
Harrison's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/20 isn't a guarantee
05/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Harrison against the rest of the dataset
About 121 days separate Harrison's last and first frost, putting it 39,051 of 40,283 ZIP codes nationally. Within NE, it ranks 603 of 605.
Learn more
Two guides worth reading on 69346: the frost range, on how to read the range around Harrison's dates instead of trusting one, and local microclimates, on what one yard in Harrison can differ from the 69346 normal.