Bennett, IA 52721 Frost Dates
Bennett, IA: when does the frost end?
Typically, the last spring freeze lands around 04/27, roughly 242 days out. Fall's first freeze usually shows up around 10/10, roughly 165 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bennett 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 Bennett's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Bennett's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 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.
Bennett against the rest of the dataset
At roughly 165 frost-free days, Bennett places 30,730 of 40,283 ZIP codes in this dataset. Within IA, it ranks 544 of 1,042.
Learn more
Before leaning on 52721's figures: local microclimates explains what one yard in Bennett can differ from the 52721 normal, while zone vs. frost date explains why Zone 5a and Bennett's frost date answer different questions.