- Latitude: 33.975
- Longitude: -117.636
High Temperatures
On July 15 in this location the average high temperature is 92.1 °F (33.4 °C). The lowest recored high temperature was 75.9 °F (24.4 °C) in 2025 and the highest recored high temperature was 108.0 °F (42.2 °C) in 1978. The high temperature is usually* between 88.3 °F (31.3 °C) and 95.9 °F (35.5 °C). About a quarter of the time, the high temperature is less than 88.3 °F (31.3 °C), and another quarter of the time, the high temperature is greater than and 95.9 °F (35.5 °C). About 95% of the time, the high temperature has been between 81.0 °F (27.2 °C) and 103.2 °F (39.5 °C).
Low Temperatures
On July 15 in this location the average low temperature is 63.3 °F (17.4 °C). The lowest recored low temperature was 53.1 °F (11.7 °C) in 2000 and the lowest recored low temperature was 79.0 °F (26.1 °C) in 1984. The low temperature is usually* between 60.5 °F (15.8 °C) and 66.1 °F (18.9 °C). About a quarter of the time, the low temperature is less than 60.5 °F (15.8 °C), and another quarter of the time, the low temperature is greater than and 66.1 °F (18.9 °C). About 95% of the time, the low temperature has been between 55.1 °F (12.9 °C) and 71.5 °F (21.9 °C).
Frost
On July 15 in this location expect the temperatures to drop below freezing for a risk of frost about 0.0% 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:
- ONTARIO INTERNATIONAL ARPT — Integrated Surface Dataset (ISD) station ID: 747040 — Weather Bureau Army Navy (WBAN): 03102 — from year 2005 to 2025
- RIVERSIDE MUNICIPAL ARPT — Integrated Surface Dataset (ISD) station ID: 722869 — Weather Bureau Army Navy (WBAN): 03171 — from year 2006 to 2025
- CHINO AIRPORT — Integrated Surface Dataset (ISD) station ID: 722899 — Weather Bureau Army Navy (WBAN): 03179 — from year 2006 to 2025
- FULLERTON MUNICIPAL ARPT — Integrated Surface Dataset (ISD) station ID: 722976 — Weather Bureau Army Navy (WBAN): 03166 — from year 2006 to 2025
- CORONA MUNICIPAL AIRPORT — Integrated Surface Dataset (ISD) station ID: 720333 — Weather Bureau Army Navy (WBAN): 53175 — from year 2011 to 2025
- BRACKETT FIELD AIRPORT — Integrated Surface Dataset (ISD) station ID: 722887 — Weather Bureau Army Navy (WBAN): 03180 — from year 2013 to 2025
- CABLE — Integrated Surface Dataset (ISD) station ID: 720329 — from year 2018 to 2025
- CORONA MUNI — Integrated Surface Dataset (ISD) station ID: 720333 — from year 2007 to 2017
- RIVERSIDE MUNI — Integrated Surface Dataset (ISD) station ID: 722869 — from year 1999 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 2002 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