Keizer, OR 97314 Frost Dates
Keizer, OR: when does the frost end?
Typically, the last spring freeze lands around 04/03, roughly 218 days out. Fall's first freeze usually shows up around 11/01, roughly 212 days after the last spring frost.
Zone 8b (15 to 20°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 Keizer, not a forecast for this year.
Stretching the season past the first frost
With roughly 9 weeks until Keizer's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Keizer's last frost
04/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Keizer against the rest of the dataset
At roughly 212 frost-free days, Keizer places 14,568 of 40,283 ZIP codes in this dataset. Within OR, it ranks 201 of 463.
Learn more
Before leaning on 97314's figures: zone vs. frost date explains why Zone 8b and Keizer's frost date answer different questions, while the frost range explains how to read the range around Keizer's dates instead of trusting one.