- Latitude: 34.095
- Longitude: -117.235
High Temperatures
On September 11 in this location the average high temperature is 91.4 °F (33.0 °C). The lowest recored high temperature was 66.0 °F (18.9 °C) in 1976 and the highest recored high temperature was 111.9 °F (44.4 °C) in 1971. The high temperature is usually* between 85.9 °F (30.0 °C) and 96.9 °F (36.0 °C). About a quarter of the time, the high temperature is less than 85.9 °F (30.0 °C), and another quarter of the time, the high temperature is greater than and 96.9 °F (36.0 °C). About 95% of the time, the high temperature has been between 75.5 °F (24.2 °C) and 107.3 °F (41.8 °C).
Low Temperatures
On September 11 in this location the average low temperature is 60.5 °F (15.9 °C). The lowest recored low temperature was 46.9 °F (8.3 °C) in 1985 and the lowest recored low temperature was 77.9 °F (25.5 °C) in 1959. The low temperature is usually* between 56.4 °F (13.6 °C) and 64.6 °F (18.1 °C). About a quarter of the time, the low temperature is less than 56.4 °F (13.6 °C), and another quarter of the time, the low temperature is greater than and 64.6 °F (18.1 °C). About 95% of the time, the low temperature has been between 48.6 °F (9.2 °C) and 72.5 °F (22.5 °C).
Frost
On September 11 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
- 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
- SAN BERNARDINO INTERNATIONAL — Integrated Surface Dataset (ISD) station ID: 722866 — Weather Bureau Army Navy (WBAN): 23122 — from year 1943 to 2013
- 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
- BEAUMONT — Integrated Surface Dataset (ISD) station ID: 722867 — from year 2000 to 2000
- BEAUMONT — Integrated Surface Dataset (ISD) station ID: 722867 — Weather Bureau Army Navy (WBAN): 23156 — from year 1973 to 1999
- BEAUMONT 1 E — Weather Bureau Army Navy (WBAN): 23156 — from year 1948 to 1952