Oil City, PA 16301 Frost Dates
Frost dates for Oil City, PA, ZIP 16301
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/23, about 175 frost-free days later.
Zone 6a (-10 to -5°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 Oil City, not a forecast for this year.
What to do before the first frost
Zone 6a around Oil City 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
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oil City compares
About 175 days separate Oil City's last and first frost, putting it 26,821 of 40,283 ZIP codes nationally. Within PA, it ranks 1,123 of 2,088.
Learn more
zone vs. frost date explains why Zone 6a and Oil City's frost date answer different questions, and the frost range explains how to read the range around Oil City's dates instead of trusting one.