Porterville, CA 93208 Frost Dates
When can you plant in Porterville, CA?
The last spring frost here typically falls around 05/11, about 256 days from today. The first fall frost typically arrives around 10/17, about 155 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 Porterville, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Porterville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Porterville's last frost
05/11 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 06/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Porterville compares
Porterville's growing season runs about 155 days, ranking 33,910 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,424 of 2,555.
Learn more
local microclimates covers what one yard in Porterville can differ from the 93208 normal. zone vs. frost date covers why Zone 8b and Porterville's frost date answer different questions.