Spray, OR 97874 Frost Dates
97874, near Spray, OR: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/14, roughly 167 days after the last spring frost.
Zone 7a (0 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 Spray, not a forecast for this year.
Stretching the season past the first frost
Spray's growing season runs out in roughly 7 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
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Spray against the rest of the dataset
At roughly 167 frost-free days, Spray places 30,225 of 40,283 ZIP codes in this dataset. Within OR, it ranks 324 of 463.
Learn more
Two guides worth reading on 97874: local microclimates, on what one yard in Spray can differ from the 97874 normal, and zone vs. frost date, on why Zone 7a and Spray's frost date answer different questions.