Ollie, IA 52576 Frost Dates
When can you plant in Ollie, IA?
The last spring frost here typically falls around 04/27, about 242 days from today. The first fall frost typically arrives around 10/12, about 168 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 Ollie, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in Ollie before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ollie compares
About 168 days separate Ollie's last and first frost, putting it 29,793 of 40,283 ZIP codes nationally. Within IA, it ranks 395 of 1,042.
Learn more
local microclimates covers what one yard in Ollie can differ from the 52576 normal. zone vs. frost date covers why Zone 5b and Ollie's frost date answer different questions.