About Castaic, CA

Castaic is a city of approximately 19,000 people in California, United States. Located in the Pacific Time Zone at 34.5°N latitude.

Expect a humid subtropical climate in Castaic: average highs of 88°F in midsummer, lows near 39°F in midwinter, and an annual mean of 59°F. Precipitation totals roughly 13 inches per year, concentrated around February, with August typically the driest month.