Climate almanac
Rancho Cucamonga
California, United States · 34.11°, -117.59°
What is the weather like in Rancho Cucamonga in December?
In December, Rancho Cucamonga is typically 67°F (19°C) during the day and 44°F (7°C) at night. The month brings about 3.0 in (77 mm) of precipitation in total.
- Average high67°F (19°C)
- Average low44°F (7°C)
- Precipitation3.0 in (77 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)