Dumont, IA 50625 Frost Dates
Dumont, IA: when does the frost end?
Around 04/28 is the usual last spring frost, about 243 days away. Fall's first freeze usually shows up around 10/10, roughly 164 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Dumont 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
With roughly 6 weeks until Dumont's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 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.
Dumont against the rest of the dataset
Dumont's growing season runs about 164 days, ranking 31,106 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 613 of 1,042.
Learn more
Before leaning on 50625's figures: zone vs. frost date explains why Zone 5a and Dumont's frost date answer different questions, while the frost range explains how to read the range around Dumont's dates instead of trusting one.