Bernard, IA 52032 Frost Dates
Frost dates for Bernard, IA, ZIP 52032
Around 04/28 is the usual last spring frost, about 243 days away. The first fall frost typically arrives around 10/11, about 165 frost-free days later.
Bernard 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 Bernard 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.
The actual range around Bernard's last frost
04/28 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. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bernard compares
Bernard's growing season runs about 165 days, ranking 30,777 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 563 of 1,042.
Learn more
the frost range explains how to read the range around Bernard's dates instead of trusting one, and local microclimates explains what one yard in Bernard can differ from the 52032 normal.