- Latitude: 34.1
- Longitude: -117.25
High Temperatures
On average, the day in December with the warmest high temperature in custom location is December 1 at an average of 69.5 °F (20.8 °C).
On average, the day in December with the coldest high temperature in custom location is December 28 at an average of 63.7 °F (17.6 °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 37.0 °F (2.8 °C) on December 11 in the year 1985 at BEAUMONT — Integrated Surface Dataset (ISD) station ID: 722867 — Weather Bureau Army Navy (WBAN): 23156 .
Low Temperatures
On average, the day in December with the warmest low temperature in custom location is December 3 at an average of 42.9 °F (6.1 °C).
On average, the day in December with the coldest low temperature in custom location is December 31 at an average of 39.8 °F (4.3 °C).
Records
The warmest recorded low temperature in custom location was 75.0 °F (23.9 °C) on December 24 in the year 1985 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .
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: