- Latitude: 34.1
- Longitude: -117.783
High Temperatures
On average, the day in December with the warmest high temperature in custom location is December 3 at an average of 69.0 °F (20.6 °C).
On average, the day in December with the coldest high temperature in custom location is December 29 at an average of 63.9 °F (17.7 °C).
Records
The warmest recorded high temperature in December in custom location was 96.1 °F (35.6 °C) on December 6 in the year 1979 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .
The coldest recorded high temperature in December in custom location was 23.0 °F (-5.0 °C) on December 25 in the year 1987 at MOUNT WILSON — Integrated Surface Dataset (ISD) station ID: 722890 — Weather Bureau Army Navy (WBAN): 93136 .
Low Temperatures
On average, the day in December with the warmest low temperature in custom location is December 2 at an average of 44.8 °F (7.1 °C).
On average, the day in December with the coldest low temperature in custom location is December 26 at an average of 41.3 °F (5.2 °C).
Records
The warmest recorded low temperature in custom location was 77.0 °F (25.0 °C) on December 5 in the year 2023 at CORONA MUNICIPAL AIRPORT — Integrated Surface Dataset (ISD) station ID: 720333 — Weather Bureau Army Navy (WBAN): 53175 .
The coldest recorded low temperature in custom location was 0.1 °F (-17.7 °C) on December 17 in the year 1979 at MOUNT WILSON — Integrated Surface Dataset (ISD) station ID: 722890 — Weather Bureau Army Navy (WBAN): 93136 .
Details
If you would like to see the temperatures for specific days, you can click on the corresponding links below: