Auburn, WA 98092 Frost Dates
Auburn, WA: when does the frost end?
Typically, the last spring freeze lands around 03/20, roughly 204 days out. Fall's first freeze usually shows up around 11/10, roughly 233 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Auburn in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 11 weeks until Auburn's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Auburn's last frost
03/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/08 and only about 1 year in 10 sees frost after that.
Auburn against the rest of the dataset
About 233 days separate Auburn's last and first frost, putting it 9,853 of 40,283 ZIP codes nationally. Within WA, it ranks 178 of 700.
Learn more
Before leaning on 98092's figures: local microclimates explains what one yard in Auburn can differ from the 98092 normal, while zone vs. frost date explains why Zone 8b and Auburn's frost date answer different questions.