- Latitude: 34.1
- Longitude: -117.25
High Temperatures
On October 9 in this location the average high temperature is 84.4 °F (29.1 °C). The lowest recored high temperature was 64.0 °F (17.8 °C) in 1949 and the highest recored high temperature was 104.0 °F (40.0 °C) in 2015. The high temperature is usually* between 78.7 °F (26.0 °C) and 90.2 °F (32.3 °C). About a quarter of the time, the high temperature is less than 78.7 °F (26.0 °C), and another quarter of the time, the high temperature is greater than and 90.2 °F (32.3 °C). About 95% of the time, the high temperature has been between 67.8 °F (19.9 °C) and 101.0 °F (38.4 °C).
Low Temperatures
On October 9 in this location the average low temperature is 54.6 °F (12.5 °C). The lowest recored low temperature was 37.0 °F (2.8 °C) in 1961 and the lowest recored low temperature was 75.0 °F (23.9 °C) in 1951. The low temperature is usually* between 51.2 °F (10.6 °C) and 58.0 °F (14.4 °C). About a quarter of the time, the low temperature is less than 51.2 °F (10.6 °C), and another quarter of the time, the low temperature is greater than and 58.0 °F (14.4 °C). About 95% of the time, the low temperature has been between 44.7 °F (7.0 °C) and 64.4 °F (18.0 °C).
Frost
On October 9 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:
- MARCH AIR RESERVE BASE — Integrated Surface Dataset (ISD) station ID: 722860 — Weather Bureau Army Navy (WBAN): 23119 — from year 1933 to 2024
- NORTON AAF — Weather Bureau Army Navy (WBAN): 23122 — from year 2014 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
- SAN BERNARDINO INTL — Integrated Surface Dataset (ISD) station ID: 722866 — from year 2009 to 2024
- RIVERSIDE MUNI — Integrated Surface Dataset (ISD) station ID: 722869 — 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
- BEAUMONT — Integrated Surface Dataset (ISD) station ID: 722867 — from year 2000 to 2000
- ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 — from year 1943 to 1999
- BEAUMONT — Integrated Surface Dataset (ISD) station ID: 722867 — Weather Bureau Army Navy (WBAN): 23156 — from year 1973 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
- BEAUMONT 1 E — Weather Bureau Army Navy (WBAN): 23156 — from year 1948 to 1952