- Latitude: 33.933
- Longitude: -116.967
High Temperatures
On September 15 in this location the average high temperature is 88.9 °F (31.6 °C). The lowest recored high temperature was 68.0 °F (20.0 °C) in 2024 and the highest recored high temperature was 106.3 °F (41.3 °C) in 1937. The high temperature is usually* between 83.5 °F (28.6 °C) and 94.3 °F (34.6 °C). About a quarter of the time, the high temperature is less than 83.5 °F (28.6 °C), and another quarter of the time, the high temperature is greater than and 94.3 °F (34.6 °C). About 95% of the time, the high temperature has been between 73.3 °F (22.9 °C) and 104.5 °F (40.3 °C).
Low Temperatures
On September 15 in this location the average low temperature is 58.3 °F (14.6 °C). The lowest recored low temperature was 32.0 °F (0.0 °C) in 2010 and the lowest recored low temperature was 79.0 °F (26.1 °C) in 1981. The low temperature is usually* between 54.4 °F (12.4 °C) and 62.3 °F (16.8 °C). About a quarter of the time, the low temperature is less than 54.4 °F (12.4 °C), and another quarter of the time, the low temperature is greater than and 62.3 °F (16.8 °C). About 95% of the time, the low temperature has been between 46.9 °F (8.3 °C) and 69.8 °F (21.0 °C).
Frost
On September 15 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
- SAN BERNARDINO INTL — Integrated Surface Dataset (ISD) station ID: 722866 — from year 2009 to 2024
- HEMET RYAN — Integrated Surface Dataset (ISD) station ID: 720687 — from year 2020 to 2024
- BIG BEAR CITY AIRPORT — Integrated Surface Dataset (ISD) station ID: A06854 — Weather Bureau Army Navy (WBAN): 00115 — from year 2020 to 2024
- SAN BERNARDINO INTERNATIONAL — Integrated Surface Dataset (ISD) station ID: 722866 — Weather Bureau Army Navy (WBAN): 23122 — from year 1943 to 2013
- WARNER SPRINGS GLIDERPORT — Integrated Surface Dataset (ISD) station ID: 720165 — from year 2007 to 2012
- RIVERSIDE/MARCH AFB — Integrated Surface Dataset (ISD) station ID: 722860 — from year 2000 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