Corvallis, OR 97330 Frost Dates
Frost dates for Corvallis, OR, ZIP 97330
Around 04/17 is the usual last spring frost, about 232 days away. The first fall frost typically arrives around 10/28, about 194 frost-free days later.
Corvallis sits in USDA Zone 8b (15 to 20°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 8b around Corvallis 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 Corvallis's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 03/22 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Corvallis compares
At roughly 194 frost-free days, Corvallis places 19,414 of 40,283 ZIP codes in this dataset. Within OR, it ranks 255 of 463.
Learn more
zone vs. frost date explains why Zone 8b and Corvallis's frost date answer different questions, and the frost range explains how to read the range around Corvallis's dates instead of trusting one.