Lineville, IA 50147 Frost Dates
50147, near Lineville, IA: the frost window
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/08, roughly 161 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lineville in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Lineville's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Lineville's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Lineville against the rest of the dataset
At roughly 161 frost-free days, Lineville places 32,174 of 40,283 ZIP codes in this dataset. Within IA, it ranks 752 of 1,042.
Learn more
Two guides worth reading on 50147: the frost range, on how to read the range around Lineville's dates instead of trusting one, and local microclimates, on what one yard in Lineville can differ from the 50147 normal.