Bay City, OR 97107 Frost Dates
97107, near Bay City, OR: the frost window
Typically, the last spring freeze lands around 03/17, roughly 201 days out. Fall's first freeze usually shows up around 11/22, roughly 251 days after the last spring frost.
Bay City sits in USDA Zone 9a (20 to 25°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
Bay City'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 03/17 isn't a guarantee
03/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/15 and only about 1 year in 10 sees frost after that.
Bay City against the rest of the dataset
About 251 days separate Bay City's last and first frost, putting it 7,352 of 40,283 ZIP codes nationally. Within OR, it ranks 60 of 463.
Learn more
Two guides worth reading on 97107: the frost range, on how to read the range around Bay City's dates instead of trusting one, and local microclimates, on what one yard in Bay City can differ from the 97107 normal.