Carbonado, WA 98348 Frost Dates
Carbonado, WA: when does the frost end?
Typically, the last spring freeze lands around 04/11, roughly 226 days out. Fall's first freeze usually shows up around 10/30, roughly 202 days after the last spring frost.
Carbonado 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
With roughly 9 weeks until Carbonado's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Carbonado against the rest of the dataset
At roughly 202 frost-free days, Carbonado places 17,298 of 40,283 ZIP codes in this dataset. Within WA, it ranks 299 of 700.
Learn more
Before leaning on 98348's figures: local microclimates explains what one yard in Carbonado can differ from the 98348 normal, while zone vs. frost date explains why Zone 8b and Carbonado's frost date answer different questions.