St. Clairsville, OH 43905 Frost Dates
Frost dates for St. Clairsville, OH, ZIP 43905
Around 04/20 is the usual last spring frost, about 235 days away. The first fall frost typically arrives around 10/29, about 192 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 St. Clairsville, not a forecast for this year.
What to do before the first frost
Zone 6b around St. Clairsville has about 9 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 St. Clairsville's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Clairsville compares
At roughly 192 frost-free days, St. Clairsville places 20,281 of 40,283 ZIP codes in this dataset. Within OH, it ranks 241 of 1,383.
Learn more
zone vs. frost date explains why Zone 6b and St. Clairsville's frost date answer different questions, and the frost range explains how to read the range around St. Clairsville's dates instead of trusting one.