Pasadena, CA 91001 Frost Dates
When can you plant in Pasadena, CA?
Typically, the last spring freeze lands around 01/08, roughly 133 days out. The first fall frost typically arrives around 01/07, about 365 frost-free days later.
Pasadena sits in USDA Zone 10b (35 to 40°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.
What to do before the first frost
About 19 weeks of growing season left in Pasadena 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
01/08 is the middle of 30 years of NOAA records, not a promise. Plant by 02/17 and you're betting against frost in roughly 9 years out of 10. 12/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Pasadena compares
At roughly 365 frost-free days, Pasadena places 418 of 40,283 ZIP codes in this dataset. Within CA, it ranks 161 of 2,555.
Learn more
the frost range covers how to read the range around Pasadena's dates instead of trusting one. local microclimates covers what one yard in Pasadena can differ from the 91001 normal.