- Latitude: 34.1
- Longitude: -117.25
High Temperatures
On November 21 in this location the average high temperature is 71.1 °F (21.7 °C). The lowest recored high temperature was 48.9 °F (9.4 °C) in 1978 and the highest recored high temperature was 93.2 °F (34.0 °C) in 2017. The high temperature is usually* between 65.5 °F (18.6 °C) and 76.7 °F (24.8 °C). About a quarter of the time, the high temperature is less than 65.5 °F (18.6 °C), and another quarter of the time, the high temperature is greater than and 76.7 °F (24.8 °C). About 95% of the time, the high temperature has been between 54.8 °F (12.7 °C) and 87.3 °F (30.7 °C).
Low Temperatures
On November 21 in this location the average low temperature is 44.5 °F (7.0 °C). The lowest recored low temperature was 27.1 °F (-2.7 °C) in 1979 and the lowest recored low temperature was 68.0 °F (20.0 °C) in 1949. The low temperature is usually* between 40.7 °F (4.8 °C) and 48.4 °F (9.1 °C). About a quarter of the time, the low temperature is less than 40.7 °F (4.8 °C), and another quarter of the time, the low temperature is greater than and 48.4 °F (9.1 °C). About 95% of the time, the low temperature has been between 33.4 °F (0.8 °C) and 55.7 °F (13.1 °C).
Frost
On November 21 in this location expect the temperatures to drop below freezing for a risk of frost about 1.4% 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 2023
- 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