Fremont, IA 52543 Frost Dates
Frost dates for Fremont, IA, ZIP 52543
Around 04/23 is the usual last spring frost, about 238 days away. The first fall frost typically arrives around 10/14, about 172 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 Fremont, not a forecast for this year.
What to do before the first frost
Zone 5b around Fremont has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fremont compares
At roughly 172 frost-free days, Fremont places 28,425 of 40,283 ZIP codes in this dataset. Within IA, it ranks 271 of 1,042.
Learn more
the frost range explains how to read the range around Fremont's dates instead of trusting one, and local microclimates explains what one yard in Fremont can differ from the 52543 normal.