Keosauqua, IA 52565 Frost Dates
Frost dates for Keosauqua, IA, ZIP 52565
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/13, about 169 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 Keosauqua, not a forecast for this year.
What to do before the first frost
Zone 5b around Keosauqua 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 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Keosauqua compares
At roughly 169 frost-free days, Keosauqua places 29,517 of 40,283 ZIP codes in this dataset. Within IA, it ranks 334 of 1,042.
Learn more
local microclimates explains what one yard in Keosauqua can differ from the 52565 normal, and zone vs. frost date explains why Zone 5b and Keosauqua's frost date answer different questions.