Arvin, CA 93388 Frost Dates
93388, near Arvin, CA: the frost window
Typically, the last spring freeze lands around 01/17, roughly 142 days out. Fall's first freeze usually shows up around 12/15, roughly 334 days after the last spring frost.
Arvin sits in USDA Zone 9b (25 to 30°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
Arvin's growing season runs out in roughly 16 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Arvin's last frost
01/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/23 and only about 1 year in 10 sees frost after that.
Arvin against the rest of the dataset
About 334 days separate Arvin's last and first frost, putting it 2,776 of 40,283 ZIP codes nationally. Within CA, it ranks 1,266 of 2,555.
Learn more
Two guides worth reading on 93388: local microclimates, on what one yard in Arvin can differ from the 93388 normal, and zone vs. frost date, on why Zone 9b and Arvin's frost date answer different questions.