Harvey, IA 50119 Frost Dates
50119, near Harvey, IA: the frost window
Around 04/21 is the usual last spring frost, about 236 days away. Fall's first freeze usually shows up around 10/16, roughly 176 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Harvey 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
Harvey's growing season runs out in roughly 7 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 Harvey's last frost
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Harvey against the rest of the dataset
At roughly 176 frost-free days, Harvey places 26,637 of 40,283 ZIP codes in this dataset. Within IA, it ranks 157 of 1,042.
Learn more
Two guides worth reading on 50119: zone vs. frost date, on why Zone 5b and Harvey's frost date answer different questions, and the frost range, on how to read the range around Harvey's dates instead of trusting one.