Grants Pass, OR 97527 Frost Dates
Frost dates for Grants Pass, OR, ZIP 97527
Around 05/16 is the usual last spring frost, about 261 days away. The first fall frost typically arrives around 10/30, about 164 frost-free days later.
The USDA Plant Hardiness Zone Map puts Grants Pass in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 8b around Grants Pass 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.
How much risk comes with planting early here
05/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 06/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Grants Pass compares
At roughly 164 frost-free days, Grants Pass places 30,847 of 40,283 ZIP codes in this dataset. Within OR, it ranks 326 of 463.
Learn more
local microclimates explains what one yard in Grants Pass can differ from the 97527 normal, and zone vs. frost date explains why Zone 8b and Grants Pass's frost date answer different questions.