Hazleton, IA 50641 Frost Dates
50641, near Hazleton, IA: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/09, roughly 163 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hazleton in Zone 5a (-20 to -15°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
Hazleton'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 Hazleton's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Hazleton against the rest of the dataset
About 163 days separate Hazleton's last and first frost, putting it 31,495 of 40,283 ZIP codes nationally. Within IA, it ranks 673 of 1,042.
Learn more
Two guides worth reading on 50641: the frost range, on how to read the range around Hazleton's dates instead of trusting one, and local microclimates, on what one yard in Hazleton can differ from the 50641 normal.