Lucas, IA 50151 Frost Dates
Frost dates for Lucas, IA, ZIP 50151
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.
Lucas 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 Lucas has about 5 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.
The actual range around Lucas's last frost
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 Lucas compares
Lucas's growing season runs about 151 days, ranking 35,182 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 985 of 1,042.
Learn more
the frost range explains how to read the range around Lucas's dates instead of trusting one, and local microclimates explains what one yard in Lucas can differ from the 50151 normal.