Mitchellville, IA 50169 Frost Dates
Mitchellville, IA: when does the frost end?
Typically, the last spring freeze lands around 04/21, roughly 236 days out. Fall's first freeze usually shows up around 10/15, roughly 174 days after the last spring frost.
Mitchellville sits in USDA Zone 5b (-15 to -10°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 7 weeks until Mitchellville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Mitchellville's last frost
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Mitchellville against the rest of the dataset
About 174 days separate Mitchellville's last and first frost, putting it 27,488 of 40,283 ZIP codes nationally. Within IA, it ranks 185 of 1,042.
Learn more
Before leaning on 50169's figures: zone vs. frost date explains why Zone 5b and Mitchellville's frost date answer different questions, while the frost range explains how to read the range around Mitchellville's dates instead of trusting one.