Beaman, IA 50609 Frost Dates
Frost dates for Beaman, IA, ZIP 50609
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/06, about 159 frost-free days later.
Beaman 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 Beaman 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 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Beaman compares
At roughly 159 frost-free days, Beaman places 32,792 of 40,283 ZIP codes in this dataset. Within IA, it ranks 804 of 1,042.
Learn more
local microclimates explains what one yard in Beaman can differ from the 50609 normal, and zone vs. frost date explains why Zone 5a and Beaman's frost date answer different questions.