Cascade, IA 52033 Frost Dates
Cascade, IA: when does the frost end?
Typically, the last spring freeze lands around 04/28, roughly 243 days out. 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 Cascade 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 Cascade'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 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Cascade against the rest of the dataset
About 164 days separate Cascade's last and first frost, putting it 30,984 of 40,283 ZIP codes nationally. Within IA, it ranks 591 of 1,042.
Learn more
Before leaning on 52033's figures: local microclimates explains what one yard in Cascade can differ from the 52033 normal, while zone vs. frost date explains why Zone 5a and Cascade's frost date answer different questions.