Springbrook, IA 52075 Frost Dates
Springbrook, IA: when does the frost end?
Around 04/25 is the usual last spring frost, about 240 days away. Fall's first freeze usually shows up around 10/16, roughly 172 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Springbrook 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 7 weeks until Springbrook's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Springbrook's last frost
04/25 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.
Springbrook against the rest of the dataset
At roughly 172 frost-free days, Springbrook places 28,531 of 40,283 ZIP codes in this dataset. Within IA, it ranks 279 of 1,042.
Learn more
Before leaning on 52075's figures: the frost range explains how to read the range around Springbrook's dates instead of trusting one, while local microclimates explains what one yard in Springbrook can differ from the 52075 normal.