Quimby, IA 51049 Frost Dates
Frost dates for Quimby, IA, ZIP 51049
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/04, about 152 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 Quimby, not a forecast for this year.
What to do before the first frost
Zone 5a around Quimby has about 5 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.
How much risk comes with planting early here
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Quimby compares
At roughly 152 frost-free days, Quimby places 34,893 of 40,283 ZIP codes in this dataset. Within IA, it ranks 958 of 1,042.
Learn more
the frost range explains how to read the range around Quimby's dates instead of trusting one, and local microclimates explains what one yard in Quimby can differ from the 51049 normal.