Grants Pass, OR 97528 Frost Dates
97528, near Grants Pass, OR: the frost window
Around 05/16 is the usual last spring frost, about 261 days away. Fall's first freeze usually shows up around 10/30, roughly 164 days after the last spring frost.
Grants Pass 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.
Stretching the season past the first frost
Grants Pass's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/07 and only about 1 year in 10 sees frost after that.
Grants Pass against the rest of the dataset
About 164 days separate Grants Pass's last and first frost, putting it 30,848 of 40,283 ZIP codes nationally. Within OR, it ranks 327 of 463.
Learn more
Two guides worth reading on 97528: zone vs. frost date, on why Zone 8b and Grants Pass's frost date answer different questions, and the frost range, on how to read the range around Grants Pass's dates instead of trusting one.