South Pasadena, CA 91030 Frost Dates
When can you plant in South Pasadena, CA?
Around 01/08 is the usual last spring frost, about 133 days away. 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.
The actual range around South Pasadena's last frost
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 1,164 of 40,283 ZIP codes nationally. Within CA, it ranks 497 of 2,555.
Learn more
zone vs. frost date covers why Zone 10a and South Pasadena's frost date answer different questions. the frost range covers how to read the range around South Pasadena's dates instead of trusting one.