Porterville, CA 93207 Frost Dates
Porterville, CA: when does the frost end?
Typically, the last spring freeze lands around 05/11, roughly 256 days out. Fall's first freeze usually shows up around 10/17, roughly 155 days after the last spring frost.
Porterville sits in USDA Zone 7b (5 to 10°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 7 weeks until Porterville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Porterville against the rest of the dataset
At roughly 155 frost-free days, Porterville places 33,909 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,423 of 2,555.
Learn more
Before leaning on 93207's figures: the frost range explains how to read the range around Porterville's dates instead of trusting one, while local microclimates explains what one yard in Porterville can differ from the 93207 normal.