Kellerton, IA 50133 Frost Dates
Frost dates for Kellerton, IA, ZIP 50133
Around 04/16 is the usual last spring frost, about 231 days away. The first fall frost typically arrives around 10/20, about 187 frost-free days later.
Kellerton sits in USDA Zone 5b (-15 to -10°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 5b around Kellerton has about 8 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
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Kellerton compares
Kellerton's growing season runs about 187 days, ranking 22,607 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 23 of 1,042.
Learn more
local microclimates explains what one yard in Kellerton can differ from the 50133 normal, and zone vs. frost date explains why Zone 5b and Kellerton's frost date answer different questions.