Mediapolis, IA 52637 Frost Dates
When can you plant in Mediapolis, IA?
Typically, the last spring freeze lands around 04/08, roughly 223 days out. The first fall frost typically arrives around 10/29, about 202 frost-free days later.
Zone 5b (-15 to -10°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 Mediapolis, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Mediapolis before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/08 isn't a guarantee
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/26 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mediapolis compares
At roughly 202 frost-free days, Mediapolis places 17,271 of 40,283 ZIP codes in this dataset. Within IA, it ranks 1 of 1,042.
Learn more
zone vs. frost date covers why Zone 5b and Mediapolis's frost date answer different questions. the frost range covers how to read the range around Mediapolis's dates instead of trusting one.