South Pasadena, CA 91105 Frost Dates
South Pasadena, CA: when does the frost end?
The last spring frost here typically falls around 01/08, about 133 days from today. Fall's first freeze usually shows up around 01/07, roughly 365 days after the last spring frost.
South Pasadena sits in USDA Zone 10a (30 to 35°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 19 weeks until South Pasadena'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
01/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/20 and only about 1 year in 10 sees frost after that.
South Pasadena against the rest of the dataset
At roughly 365 frost-free days, South Pasadena places 1,165 of 40,283 ZIP codes in this dataset. Within CA, it ranks 498 of 2,555.
Learn more
Before leaning on 91105's figures: the frost range explains how to read the range around South Pasadena's dates instead of trusting one, while local microclimates explains what one yard in South Pasadena can differ from the 91105 normal.