S
M
T
W
T
F
S
26
93°
71°
27
92°
69°
28
93°
71°
29
94°
73°
30
94°
73°
31
89°
72°
1
89°
73°
2
87°
73°
3
87°
72°
4
89°
73°
5
91°
69°
6
90°
70°
7
91°
70°
8
92°
72°
9
89°
73°
10
89°
73°
11
90°
70°
12
90°
70°
13
89°
68°
14
91°
68°
15
93°
71°
16
93°
73°
17
92°
73°
18
93°
72°
19
93°
72°
20
90°
71°
21
92°
66°
22
88°
66°
23
87°
68°
24
89°
67°
25
88°
69°
26
90°
71°
27
91°
71°
28
91°
70°
29
92°
70°
30
92°
69°
31
91°
70°
1
92°
69°
2
88°
68°
3
91°
68°
4
92°
69°
5
91°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lake Arrowhead
Lake Arrowhead's August 2026 forecast shows daily high temperatures ranging from 87° to 94°, with overnight lows between 66° and 73°. The average high for August is 91° with an average low of 70°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Lake Arrowhead. See also: September | October | November.
