- Latitude: 33.975
- Longitude: -117.636
High Temperatures
On June 25 in this location the average high temperature is 88.5 °F (31.4 °C). The lowest recored high temperature was 68.0 °F (20.0 °C) in 1952 and the highest recored high temperature was 120.9 °F (49.4 °C) in 1974. The high temperature is usually* between 82.7 °F (28.2 °C) and 94.3 °F (34.6 °C). About a quarter of the time, the high temperature is less than 82.7 °F (28.2 °C), and another quarter of the time, the high temperature is greater than and 94.3 °F (34.6 °C). About 95% of the time, the high temperature has been between 71.7 °F (22.1 °C) and 105.3 °F (40.7 °C).
Low Temperatures
On June 25 in this location the average low temperature is 59.3 °F (15.1 °C). The lowest recored low temperature was 45.9 °F (7.7 °C) in 2012 and the lowest recored low temperature was 70.0 °F (21.1 °C) in 2024. The low temperature is usually* between 56.4 °F (13.5 °C) and 62.1 °F (16.7 °C). About a quarter of the time, the low temperature is less than 56.4 °F (13.5 °C), and another quarter of the time, the low temperature is greater than and 62.1 °F (16.7 °C). About 95% of the time, the low temperature has been between 50.9 °F (10.5 °C) and 67.6 °F (19.8 °C).
Frost
On June 25 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