Farnhamville, IA 50538 Frost Dates
Frost dates for Farnhamville, IA, ZIP 50538
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/10, about 167 frost-free days later.
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 Farnhamville, not a forecast for this year.
What to do before the first frost
Zone 5a around Farnhamville has about 6 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.
The actual range around Farnhamville's last frost
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Farnhamville compares
About 167 days separate Farnhamville's last and first frost, putting it 30,166 of 40,283 ZIP codes nationally. Within IA, it ranks 428 of 1,042.
Learn more
local microclimates explains what one yard in Farnhamville can differ from the 50538 normal, and zone vs. frost date explains why Zone 5a and Farnhamville's frost date answer different questions.