Cantril, IA 52573 Frost Dates
Cantril, IA: when does the frost end?
The last spring frost here typically falls around 04/26, about 241 days from today. Fall's first freeze usually shows up around 10/13, roughly 169 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Cantril in Zone 6a (-10 to -5°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 7 weeks until Cantril'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
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 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.
Cantril against the rest of the dataset
About 169 days separate Cantril's last and first frost, putting it 29,605 of 40,283 ZIP codes nationally. Within IA, it ranks 355 of 1,042.
Learn more
Before leaning on 52573's figures: zone vs. frost date explains why Zone 6a and Cantril's frost date answer different questions, while the frost range explains how to read the range around Cantril's dates instead of trusting one.