Johnson, NE 68379 Frost Dates
Johnson, NE: when does the frost end?
Typically, the last spring freeze lands around 04/26, roughly 241 days out. Fall's first freeze usually shows up around 10/10, roughly 164 days after the last spring frost.
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 Johnson, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Johnson's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Johnson against the rest of the dataset
At roughly 164 frost-free days, Johnson places 31,177 of 40,283 ZIP codes in this dataset. Within NE, it ranks 330 of 605.
Learn more
Before leaning on 68379's figures: zone vs. frost date explains why Zone 5b and Johnson's frost date answer different questions, while the frost range explains how to read the range around Johnson's dates instead of trusting one.