- Latitude: 34.095
- Longitude: -117.235
High Temperatures
On July 18 in this location the average high temperature is 94.2 °F (34.5 °C). The lowest recored high temperature was 78.1 °F (25.6 °C) in 1987 and the highest recored high temperature was 107.6 °F (42.0 °C) in 2009. The high temperature is usually* between 90.4 °F (32.5 °C) and 97.9 °F (36.6 °C). About a quarter of the time, the high temperature is less than 90.4 °F (32.5 °C), and another quarter of the time, the high temperature is greater than and 97.9 °F (36.6 °C). About 95% of the time, the high temperature has been between 83.3 °F (28.5 °C) and 105.0 °F (40.5 °C).
Low Temperatures
On July 18 in this location the average low temperature is 63.0 °F (17.2 °C). The lowest recored low temperature was 51.1 °F (10.6 °C) in 1987 and the lowest recored low temperature was 82.0 °F (27.8 °C) in 1978. The low temperature is usually* between 59.2 °F (15.1 °C) and 66.8 °F (19.4 °C). About a quarter of the time, the low temperature is less than 59.2 °F (15.1 °C), and another quarter of the time, the low temperature is greater than and 66.8 °F (19.4 °C). About 95% of the time, the low temperature has been between 51.9 °F (11.0 °C) and 74.1 °F (23.4 °C).
Frost
On July 18 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 2025
- NORTON AAF — Weather Bureau Army Navy (WBAN): 23122 — from year 2015 to 2025
- RIVERSIDE MUNICIPAL ARPT — Integrated Surface Dataset (ISD) station ID: 722869 — Weather Bureau Army Navy (WBAN): 03171 — from year 2006 to 2025
- SAN BERNARDINO INTL — Integrated Surface Dataset (ISD) station ID: 722866 — from year 2009 to 2025
- RIVERSIDE MUNI — Integrated Surface Dataset (ISD) station ID: 722869 — from year 1999 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 2002 to 2004
- BEAUMONT — Integrated Surface Dataset (ISD) station ID: 722867 — from year 2000 to 2001
- 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 1993
- BEAUMONT 1 E — Weather Bureau Army Navy (WBAN): 23156 — from year 1948 to 1953