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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Lake Arrowhead, CA
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September
Average Temperature
High
26°
Feels 26
Low
14°
Feels 13
Average Precipitation
2 Days
Rain amount
8mm
Snow amount
0.1cm
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Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
20°
22
23°
23
26°
24
25°
25
25°
26
24°
27
23°
28
25°
29
27°
30
25°
Forecast
Monday, September 21, 2026
Day
20°
Feels 20
Wind
21 km/h S
Gust
32 km/h
Humidity
30%
P.O.P
20%
Night
10°
Feels 10
Wind
12 km/h E
Gust
18 km/h
Humidity
78%
P.O.P
0%
Historical Averages
Sep 21
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.