Hillsboro, MO 63050 Frost Dates
Frost dates for Hillsboro, MO, ZIP 63050
Typically, the last spring freeze lands around 04/09, roughly 224 days out. The first fall frost typically arrives around 10/26, about 197 frost-free days later.
Zone 6b (-5 to 0°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 Hillsboro, not a forecast for this year.
What to do before the first frost
Zone 6b around Hillsboro has about 8 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.
How much risk comes with planting early here
04/09 is the middle of 30 years of NOAA records, not a promise. Plant by 03/25 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hillsboro compares
About 197 days separate Hillsboro's last and first frost, putting it 18,681 of 40,283 ZIP codes nationally. Within MO, it ranks 543 of 1,129.
Learn more
zone vs. frost date explains why Zone 6b and Hillsboro's frost date answer different questions, and the frost range explains how to read the range around Hillsboro's dates instead of trusting one.