Ione, CA 95225 Frost Dates
When can you plant in Ione, CA?
The last spring frost here typically falls around 01/22, about 147 days from today. The first fall frost typically arrives around 12/17, about 332 frost-free days later.
Zone 9b (25 to 30°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 Ione, not a forecast for this year.
What to do before the first frost
About 16 weeks of growing season left in Ione before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Ione's last frost
01/22 is the middle of 30 years of NOAA records, not a promise. Plant by 03/01 and you're betting against frost in roughly 9 years out of 10. 12/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ione compares
At roughly 332 frost-free days, Ione places 2,870 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,295 of 2,555.
Learn more
local microclimates covers what one yard in Ione can differ from the 95225 normal. zone vs. frost date covers why Zone 9b and Ione's frost date answer different questions.