Phoenix, OR 97535 Frost Dates
Phoenix, OR: when does the frost end?
Around 04/08 is the usual last spring frost, about 223 days away. Fall's first freeze usually shows up around 10/29, roughly 204 days after the last spring frost.
Phoenix 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
With roughly 9 weeks until Phoenix's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Phoenix's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Phoenix against the rest of the dataset
At roughly 204 frost-free days, Phoenix places 16,586 of 40,283 ZIP codes in this dataset. Within OR, it ranks 217 of 463.
Learn more
Before leaning on 97535's figures: zone vs. frost date explains why Zone 8b and Phoenix's frost date answer different questions, while the frost range explains how to read the range around Phoenix's dates instead of trusting one.