Vancouver, WA 98663 Frost Dates
98663, near Vancouver, WA: the frost window
Typically, the last spring freeze lands around 03/29, roughly 213 days out. Fall's first freeze usually shows up around 11/09, roughly 223 days after the last spring frost.
Vancouver 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
Vancouver's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Vancouver's last frost
03/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/18 and only about 1 year in 10 sees frost after that.
Vancouver against the rest of the dataset
About 223 days separate Vancouver's last and first frost, putting it 11,995 of 40,283 ZIP codes nationally. Within WA, it ranks 222 of 700.
Learn more
Two guides worth reading on 98663: zone vs. frost date, on why Zone 8b and Vancouver's frost date answer different questions, and the frost range, on how to read the range around Vancouver's dates instead of trusting one.