Climate almanac
Sylmar
California, United States · 34.31°, -118.45°
What is the weather like in Sylmar in December?
In December, Sylmar is typically 66°F (19°C) during the day and 46°F (8°C) at night. The month brings about 3.1 in (79 mm) of precipitation in total.
- Average high66°F (19°C)
- Average low46°F (8°C)
- Precipitation3.1 in (79 mm)
- Clear or mostly clear days15
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)