Iowa, LA 70647 Frost Dates
Iowa, LA: when does the frost end?
Around 03/02 is the usual last spring frost, about 186 days away. Fall's first freeze usually shows up around 11/25, roughly 267 days after the last spring frost.
Iowa sits in USDA Zone 9a (20 to 25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 13 weeks until Iowa's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Iowa's last frost
03/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/26 and only about 1 year in 10 sees frost after that.
Iowa against the rest of the dataset
At roughly 267 frost-free days, Iowa places 5,858 of 40,283 ZIP codes in this dataset. Within LA, it ranks 440 of 710.
Learn more
Before leaning on 70647's figures: local microclimates explains what one yard in Iowa can differ from the 70647 normal, while zone vs. frost date explains why Zone 9a and Iowa's frost date answer different questions.