Glendale, OR 97442 Frost Dates
97442, near Glendale, 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.
Glendale 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
Glendale'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.
Why 05/16 isn't a guarantee
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.
Glendale against the rest of the dataset
Glendale's growing season runs about 164 days, ranking 31,070 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 334 of 463.
Learn more
Two guides worth reading on 97442: the frost range, on how to read the range around Glendale's dates instead of trusting one, and local microclimates, on what one yard in Glendale can differ from the 97442 normal.