Carbonado, WA 98497 Frost Dates
When can you plant in Carbonado, WA?
The last spring frost here typically falls around 04/11, about 226 days from today. The first fall frost typically arrives around 10/30, about 202 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Carbonado, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Carbonado before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 and you're betting against frost in roughly 9 years out of 10. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Carbonado compares
About 202 days separate Carbonado's last and first frost, putting it 17,313 of 40,283 ZIP codes nationally. Within WA, it ranks 314 of 700.
Learn more
zone vs. frost date covers why Zone 8b and Carbonado's frost date answer different questions. the frost range covers how to read the range around Carbonado's dates instead of trusting one.