Blakesburg, IA 52536 Frost Dates
Blakesburg, IA: when does the frost end?
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/14, roughly 172 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Blakesburg in Zone 5b (-15 to -10°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 Blakesburg's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Blakesburg against the rest of the dataset
At roughly 172 frost-free days, Blakesburg places 28,509 of 40,283 ZIP codes in this dataset. Within IA, it ranks 276 of 1,042.
Learn more
Before leaning on 52536's figures: local microclimates explains what one yard in Blakesburg can differ from the 52536 normal, while zone vs. frost date explains why Zone 5b and Blakesburg's frost date answer different questions.