Lake Forest, CA 92630 Frost Dates
Lake Forest, CA: when does the frost end?
Typically, the last spring freeze lands around 01/05, roughly 130 days out. Fall's first freeze usually shows up around 12/25, roughly 365 days after the last spring frost.
Lake Forest 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.
Stretching the season past the first frost
With roughly 17 weeks until Lake Forest's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Lake Forest's last frost
01/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/14 and only about 1 year in 10 sees frost after that.
Lake Forest against the rest of the dataset
About 365 days separate Lake Forest's last and first frost, putting it 604 of 40,283 ZIP codes nationally. Within CA, it ranks 274 of 2,555.
Learn more
Before leaning on 92630's figures: the frost range explains how to read the range around Lake Forest's dates instead of trusting one, while local microclimates explains what one yard in Lake Forest can differ from the 92630 normal.