- Latitude: 33.952
- Longitude: -117.439
High Temperatures
On average, the day in December with the warmest high temperature in custom location is December 1 at an average of 70.1 °F (21.2 °C).
On average, the day in December with the coldest high temperature in custom location is December 28 at an average of 64.4 °F (18.0 °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 42.8 °F (6.0 °C) on December 31 in the year 2014 at NORTON AAF — Weather Bureau Army Navy (WBAN): 23122 .
Low Temperatures
On average, the day in December with the warmest low temperature in custom location is December 3 at an average of 42.6 °F (5.9 °C).
On average, the day in December with the coldest low temperature in custom location is December 27 at an average of 39.6 °F (4.2 °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 17.1 °F (-8.3 °C) on December 9 in the year 1971 at MARCH AIR RESERVE BASE — Integrated Surface Dataset (ISD) station ID: 722860 — Weather Bureau Army Navy (WBAN): 23119 .
Details
If you would like to see the temperatures for specific days, you can click on the corresponding links below: