Oxford Junction, IA 52323 Frost Dates
Frost dates for Oxford Junction, IA, ZIP 52323
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/10, about 165 frost-free days later.
Oxford Junction sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 5a around Oxford Junction 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.
Why 04/27 isn't a guarantee
04/27 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. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oxford Junction compares
At roughly 165 frost-free days, Oxford Junction places 30,712 of 40,283 ZIP codes in this dataset. Within IA, it ranks 539 of 1,042.
Learn more
local microclimates explains what one yard in Oxford Junction can differ from the 52323 normal, and zone vs. frost date explains why Zone 5a and Oxford Junction's frost date answer different questions.