Myrtle Creek, OR 97457 Frost Dates
97457, near Myrtle Creek, OR: the frost window
The last spring frost here typically falls around 03/23, about 207 days from today. Fall's first freeze usually shows up around 11/18, roughly 237 days after the last spring frost.
Myrtle Creek 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
Myrtle Creek's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/23 isn't a guarantee
03/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/16 and only about 1 year in 10 sees frost after that.
Myrtle Creek against the rest of the dataset
About 237 days separate Myrtle Creek's last and first frost, putting it 9,110 of 40,283 ZIP codes nationally. Within OR, it ranks 130 of 463.
Learn more
Two guides worth reading on 97457: the frost range, on how to read the range around Myrtle Creek's dates instead of trusting one, and local microclimates, on what one yard in Myrtle Creek can differ from the 97457 normal.