South Pasadena, CA 90042 Frost Dates
When can you plant in South Pasadena, CA?
The last spring frost here typically falls around 01/08, about 133 days from today. The first fall frost typically arrives around 01/07, about 365 frost-free days later.
Zone 10a (30 to 35°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 South Pasadena, not a forecast for this year.
What to do before the first frost
About 19 weeks of growing season left in South 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 South Pasadena compares
About 365 days separate South Pasadena's last and first frost, putting it 1,162 of 40,283 ZIP codes nationally. Within CA, it ranks 495 of 2,555.
Learn more
the frost range covers how to read the range around South Pasadena's dates instead of trusting one. local microclimates covers what one yard in South Pasadena can differ from the 90042 normal.