Maynard, IA 50655 Frost Dates
Maynard, IA: when does the frost end?
Around 04/27 is the usual last spring frost, about 242 days away. Fall's first freeze usually shows up around 10/13, roughly 169 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 Maynard, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Maynard's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Maynard against the rest of the dataset
About 169 days separate Maynard's last and first frost, putting it 29,569 of 40,283 ZIP codes nationally. Within IA, it ranks 338 of 1,042.
Learn more
Before leaning on 50655's figures: the frost range explains how to read the range around Maynard's dates instead of trusting one, while local microclimates explains what one yard in Maynard can differ from the 50655 normal.