- Latitude: 34.095
- Longitude: -117.235
High Temperatures
On December 12 in this location the average high temperature is 65.8 °F (18.8 °C). The lowest recored high temperature was 45.0 °F (7.2 °C) in 1949 and the highest recored high temperature was 86.0 °F (30.0 °C) in 2010. The high temperature is usually* between 60.6 °F (15.9 °C) and 71.0 °F (21.7 °C). About a quarter of the time, the high temperature is less than 60.6 °F (15.9 °C), and another quarter of the time, the high temperature is greater than and 71.0 °F (21.7 °C). About 95% of the time, the high temperature has been between 50.7 °F (10.4 °C) and 81.0 °F (27.2 °C).
Low Temperatures
On December 12 in this location the average low temperature is 41.1 °F (5.0 °C). The lowest recored low temperature was 24.1 °F (-4.4 °C) in 1985 and the lowest recored low temperature was 57.9 °F (14.4 °C) in 1952. The low temperature is usually* between 37.0 °F (2.8 °C) and 45.2 °F (7.3 °C). About a quarter of the time, the low temperature is less than 37.0 °F (2.8 °C), and another quarter of the time, the low temperature is greater than and 45.2 °F (7.3 °C). About 95% of the time, the low temperature has been between 29.2 °F (-1.5 °C) and 52.9 °F (11.6 °C).
Frost
On December 12 in this location expect the temperatures to drop below freezing for a risk of frost about 6.7% 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
- 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
- NORTON AAF — Weather Bureau Army Navy (WBAN): 23122 — from year 2014 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
- 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
- SAN BERNARDINO INTERNATIONAL — Integrated Surface Dataset (ISD) station ID: 722866 — Weather Bureau Army Navy (WBAN): 23122 — from year 1943 to 1992
- BEAUMONT 1 E — Weather Bureau Army Navy (WBAN): 23156 — from year 1948 to 1952