- Latitude: 34.1
- Longitude: -117.783
High Temperatures
On December 10 in this location the average high temperature is 67.9 °F (20.0 °C). The lowest recored high temperature was 33.1 °F (0.6 °C) in 1985 and the highest recored high temperature was 93.0 °F (33.9 °C) in 1950. The high temperature is usually* between 62.5 °F (17.0 °C) and 73.3 °F (22.9 °C). About a quarter of the time, the high temperature is less than 62.5 °F (17.0 °C), and another quarter of the time, the high temperature is greater than and 73.3 °F (22.9 °C). About 95% of the time, the high temperature has been between 52.3 °F (11.3 °C) and 83.6 °F (28.6 °C).
Low Temperatures
On December 10 in this location the average low temperature is 43.7 °F (6.5 °C). The lowest recored low temperature was 26.6 °F (-3.0 °C) in 2011 and the lowest recored low temperature was 64.9 °F (18.3 °C) in 1950. The low temperature is usually* between 39.8 °F (4.3 °C) and 47.5 °F (8.6 °C). About a quarter of the time, the low temperature is less than 39.8 °F (4.3 °C), and another quarter of the time, the low temperature is greater than and 47.5 °F (8.6 °C). About 95% of the time, the low temperature has been between 32.4 °F (0.2 °C) and 54.9 °F (12.7 °C).
Frost
On December 10 in this location expect the temperatures to drop below freezing for a risk of frost about 2.1% of the time.
Data Source(s)
The data used to compute the average high/low temperatures for this location were taken from the following stations:
- MOUNT WILSON — Integrated Surface Dataset (ISD) station ID: 722890 — Weather Bureau Army Navy (WBAN): 93136 — from year 1978 to 2024
- ONTARIO INTERNATIONAL ARPT — Integrated Surface Dataset (ISD) station ID: 747040 — Weather Bureau Army Navy (WBAN): 03102 — from year 2005 to 2024
- CHINO AIRPORT — Integrated Surface Dataset (ISD) station ID: 722899 — Weather Bureau Army Navy (WBAN): 03179 — from year 2006 to 2024
- FULLERTON MUNICIPAL ARPT — Integrated Surface Dataset (ISD) station ID: 722976 — Weather Bureau Army Navy (WBAN): 03166 — from year 2006 to 2024
- CORONA MUNICIPAL AIRPORT — Integrated Surface Dataset (ISD) station ID: 720333 — Weather Bureau Army Navy (WBAN): 53175 — from year 2011 to 2024
- BRACKETT FIELD AIRPORT — Integrated Surface Dataset (ISD) station ID: 722887 — Weather Bureau Army Navy (WBAN): 03180 — from year 2012 to 2024
- EL MONTE AIRPORT — Integrated Surface Dataset (ISD) station ID: 747043 — Weather Bureau Army Navy (WBAN): 03165 — from year 2012 to 2024
- CABLE — Integrated Surface Dataset (ISD) station ID: 720329 — from year 2017 to 2024
- CORONA MUNI — Integrated Surface Dataset (ISD) station ID: 720333 — from year 2006 to 2016
- FULLERTON MUNICIPAL — Integrated Surface Dataset (ISD) station ID: 722976 — from year 1981 to 2005
- CHINO — Integrated Surface Dataset (ISD) station ID: 722899 — from year 1998 to 2005
- ONTARIO INTL ARPT — Integrated Surface Dataset (ISD) station ID: 747040 — from year 2001 to 2004
- ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — from year 2000 to 2000
- ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 — from year 1943 to 1999
- ONTARIO INTERNATIONAL ARPT — Weather Bureau Army Navy (WBAN): 03102 — from year 1968 to 1972
- PASADENA — Integrated Surface Dataset (ISD) station ID: 749169 — from year 1943 to 1943