Oxford, IA 52322 Frost Dates
Frost dates for Oxford, IA, ZIP 52322
Around 04/21 is the usual last spring frost, about 236 days away. The first fall frost typically arrives around 10/18, about 180 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 Oxford, not a forecast for this year.
What to do before the first frost
Zone 5b around Oxford 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.
How much risk comes with planting early here
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 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 Oxford compares
About 180 days separate Oxford's last and first frost, putting it 24,995 of 40,283 ZIP codes nationally. Within IA, it ranks 96 of 1,042.
Learn more
the frost range explains how to read the range around Oxford's dates instead of trusting one, and local microclimates explains what one yard in Oxford can differ from the 52322 normal.