- Latitude: 34.112
- Longitude: -117.688
High Temperatures
On December 13 in this location the average high temperature is 68.0 °F (20.0 °C). The lowest recored high temperature was 53.1 °F (11.7 °C) in 1975 and the highest recored high temperature was 88.0 °F (31.1 °C) in 2010. The high temperature is usually* between 63.0 °F (17.2 °C) and 73.1 °F (22.8 °C). About a quarter of the time, the high temperature is less than 63.0 °F (17.2 °C), and another quarter of the time, the high temperature is greater than and 73.1 °F (22.8 °C). About 95% of the time, the high temperature has been between 53.5 °F (11.9 °C) and 82.6 °F (28.1 °C).
Low Temperatures
On December 13 in this location the average low temperature is 42.3 °F (5.7 °C). The lowest recored low temperature was 26.1 °F (-3.3 °C) in 2024 and the lowest recored low temperature was 66.2 °F (19.0 °C) in 2020. The low temperature is usually* between 37.9 °F (3.3 °C) and 46.6 °F (8.1 °C). About a quarter of the time, the low temperature is less than 37.9 °F (3.3 °C), and another quarter of the time, the low temperature is greater than and 46.6 °F (8.1 °C). About 95% of the time, the low temperature has been between 29.6 °F (-1.3 °C) and 54.9 °F (12.7 °C).
Frost
On December 13 in this location expect the temperatures to drop below freezing for a risk of frost about 5.6% 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