Climate almanac
Castaic
California, United States · 34.49°, -118.62°
What is the weather like in Castaic in August?
In August, Castaic is typically 90°F (32°C) during the day and 67°F (19°C) at night. The month brings about 0.4 in (10 mm) of precipitation in total.
- Average high90°F (32°C)
- Average low67°F (19°C)
- Precipitation0.4 in (10 mm)
- Clear or mostly clear days27
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)