Monthly Historical AveragesDiamond Bar, CA
Average Temperature
High
30°
Feels 31
Low
17°
Feels 17
Average Precipitation
1 Days
2.6mm
0cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, July 12, 2026
Day
31°Feels 31
Wind
14 km/h SW
Gust
21 km/h
Humidity
36%
P.O.P
30%
Night
20°Feels 20
Wind
17 km/h SW
Gust
26 km/h
Humidity
78%
P.O.P
20%
Historical AveragesJul 12
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity