- Latitude: 34.112
- Longitude: -117.688
High Temperatures
On December 8 in this location the average high temperature is 69.5 °F (20.9 °C). The lowest recored high temperature was 51.1 °F (10.6 °C) in 2009 and the highest recored high temperature was 88.0 °F (31.1 °C) in 1975. The high temperature is usually* between 63.7 °F (17.6 °C) and 75.4 °F (24.1 °C). About a quarter of the time, the high temperature is less than 63.7 °F (17.6 °C), and another quarter of the time, the high temperature is greater than and 75.4 °F (24.1 °C). About 95% of the time, the high temperature has been between 52.6 °F (11.5 °C) and 86.4 °F (30.2 °C).
Low Temperatures
On December 8 in this location the average low temperature is 43.5 °F (6.4 °C). The lowest recored low temperature was 23.0 °F (-5.0 °C) in 2011 and the lowest recored low temperature was 75.2 °F (24.0 °C) in 2006. The low temperature is usually* between 39.3 °F (4.1 °C) and 47.7 °F (8.7 °C). About a quarter of the time, the low temperature is less than 39.3 °F (4.1 °C), and another quarter of the time, the low temperature is greater than and 47.7 °F (8.7 °C). About 95% of the time, the low temperature has been between 31.3 °F (-0.4 °C) and 55.7 °F (13.2 °C).
Frost
On December 8 in this location expect the temperatures to drop below freezing for a risk of frost about 3.2% 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:
- ONTARIO INTERNATIONAL ARPT — Integrated Surface Dataset (ISD) station ID: 747040 — Weather Bureau Army Navy (WBAN): 03102 — from year 2005 to 2024
- RIVERSIDE MUNICIPAL ARPT — Integrated Surface Dataset (ISD) station ID: 722869 — Weather Bureau Army Navy (WBAN): 03171 — from year 2006 to 2024
- CHINO AIRPORT — Integrated Surface Dataset (ISD) station ID: 722899 — Weather Bureau Army Navy (WBAN): 03179 — 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
- RIVERSIDE MUNI — Integrated Surface Dataset (ISD) station ID: 722869 — from year 1998 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