- Latitude: 34.112
- Longitude: -117.688
High Temperatures
On September 25 in this location the average high temperature is 89.5 °F (31.9 °C). The lowest recored high temperature was 68.0 °F (20.0 °C) in 1986 and the highest recored high temperature was 108.0 °F (42.2 °C) in 2010. The high temperature is usually* between 83.6 °F (28.7 °C) and 95.4 °F (35.2 °C). About a quarter of the time, the high temperature is less than 83.6 °F (28.7 °C), and another quarter of the time, the high temperature is greater than and 95.4 °F (35.2 °C). About 95% of the time, the high temperature has been between 72.4 °F (22.4 °C) and 106.6 °F (41.4 °C).
Low Temperatures
On September 25 in this location the average low temperature is 59.6 °F (15.3 °C). The lowest recored low temperature was 45.0 °F (7.2 °C) in 2013 and the lowest recored low temperature was 78.8 °F (26.0 °C) in 2015. The low temperature is usually* between 56.2 °F (13.4 °C) and 63.0 °F (17.2 °C). About a quarter of the time, the low temperature is less than 56.2 °F (13.4 °C), and another quarter of the time, the low temperature is greater than and 63.0 °F (17.2 °C). About 95% of the time, the low temperature has been between 49.6 °F (9.8 °C) and 69.5 °F (20.9 °C).
Frost
On September 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 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 2018 to 2024
- CORONA MUNI — Integrated Surface Dataset (ISD) station ID: 720333 — from year 2006 to 2017
- 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