Sandyville, IA 50001 Frost Dates
50001, near Sandyville, IA: the frost window
Around 04/24 is the usual last spring frost, about 239 days away. Fall's first freeze usually shows up around 10/12, roughly 168 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sandyville 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
Sandyville'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.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Sandyville against the rest of the dataset
At roughly 168 frost-free days, Sandyville places 29,823 of 40,283 ZIP codes in this dataset. Within IA, it ranks 411 of 1,042.
Learn more
Two guides worth reading on 50001: the frost range, on how to read the range around Sandyville's dates instead of trusting one, and local microclimates, on what one yard in Sandyville can differ from the 50001 normal.