- Latitude: 33.952
- Longitude: -117.439
High Temperatures
On December 14 in this location the average high temperature is 66.7 °F (19.3 °C). The lowest recored high temperature was 43.0 °F (6.1 °C) in 1967 and the highest recored high temperature was 84.9 °F (29.4 °C) in 2017. The high temperature is usually* between 61.5 °F (16.4 °C) and 72.0 °F (22.2 °C). About a quarter of the time, the high temperature is less than 61.5 °F (16.4 °C), and another quarter of the time, the high temperature is greater than and 72.0 °F (22.2 °C). About 95% of the time, the high temperature has been between 51.6 °F (10.9 °C) and 81.9 °F (27.7 °C).
Low Temperatures
On December 14 in this location the average low temperature is 40.2 °F (4.6 °C). The lowest recored low temperature was 24.8 °F (-4.0 °C) in 2008 and the lowest recored low temperature was 60.1 °F (15.6 °C) in 1953. The low temperature is usually* between 36.5 °F (2.5 °C) and 44.0 °F (6.7 °C). About a quarter of the time, the low temperature is less than 36.5 °F (2.5 °C), and another quarter of the time, the low temperature is greater than and 44.0 °F (6.7 °C). About 95% of the time, the low temperature has been between 29.3 °F (-1.5 °C) and 51.1 °F (10.6 °C).
Frost
On December 14 in this location expect the temperatures to drop below freezing for a risk of frost about 7.0% 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:
- MARCH AIR RESERVE BASE — Integrated Surface Dataset (ISD) station ID: 722860 — Weather Bureau Army Navy (WBAN): 23119 — from year 1933 to 2024
- 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
- SAN BERNARDINO INTL — Integrated Surface Dataset (ISD) station ID: 722866 — from year 2009 to 2024
- CORONA MUNICIPAL AIRPORT — Integrated Surface Dataset (ISD) station ID: 720333 — Weather Bureau Army Navy (WBAN): 53175 — from year 2011 to 2024
- CABLE — Integrated Surface Dataset (ISD) station ID: 720329 — from year 2017 to 2024
- NORTON AAF — Weather Bureau Army Navy (WBAN): 23122 — from year 2014 to 2023
- 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
- RIVERSIDE/MARCH AFB — Integrated Surface Dataset (ISD) station ID: 722860 — from year 2000 to 2004
- 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
- SAN BERNARDINO INTERNATIONAL — Integrated Surface Dataset (ISD) station ID: 722866 — Weather Bureau Army Navy (WBAN): 23122 — from year 1943 to 1992
- ONTARIO INTERNATIONAL ARPT — Weather Bureau Army Navy (WBAN): 03102 — from year 1968 to 1972