Carbonado, WA 98323 Frost Dates
Frost dates for Carbonado, WA, ZIP 98323
Typically, the last spring freeze lands around 04/18, roughly 233 days out. The first fall frost typically arrives around 10/31, about 196 frost-free days later.
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.
What to do before the first frost
Zone 8b around Carbonado has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Carbonado compares
At roughly 196 frost-free days, Carbonado places 19,040 of 40,283 ZIP codes in this dataset. Within WA, it ranks 358 of 700.
Learn more
the frost range explains how to read the range around Carbonado's dates instead of trusting one, and local microclimates explains what one yard in Carbonado can differ from the 98323 normal.