Brunsville, IA 51008 Frost Dates
Frost dates for Brunsville, IA, ZIP 51008
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/04, about 157 frost-free days later.
Brunsville 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 Brunsville 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 Brunsville's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 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 Brunsville compares
At roughly 157 frost-free days, Brunsville places 33,462 of 40,283 ZIP codes in this dataset. Within IA, it ranks 857 of 1,042.
Learn more
zone vs. frost date explains why Zone 5a and Brunsville's frost date answer different questions, and the frost range explains how to read the range around Brunsville's dates instead of trusting one.