Lacona, IA 50139 Frost Dates
When can you plant in Lacona, IA?
The last spring frost here typically falls around 05/05, about 250 days from today. The first fall frost typically arrives around 10/05, about 151 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 Lacona, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Lacona before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lacona compares
About 151 days separate Lacona's last and first frost, putting it 35,158 of 40,283 ZIP codes nationally. Within IA, it ranks 981 of 1,042.
Learn more
zone vs. frost date covers why Zone 5b and Lacona's frost date answer different questions. the frost range covers how to read the range around Lacona's dates instead of trusting one.