Floyd, IA 50435 Frost Dates
Floyd, IA: when does the frost end?
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/06, roughly 157 days after the last spring frost.
Zone 5a (-20 to -15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Floyd, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Floyd's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Floyd against the rest of the dataset
Floyd's growing season runs about 157 days, ranking 33,451 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 851 of 1,042.
Learn more
Before leaning on 50435's figures: the frost range explains how to read the range around Floyd's dates instead of trusting one, while local microclimates explains what one yard in Floyd can differ from the 50435 normal.