S
M
T
W
T
F
S
26
97°
66°
27
100°
67°
28
100°
66°
29
94°
66°
30
97°
65°
31
97°
62°
1
96°
62°
2
94°
61°
3
95°
62°
4
94°
61°
5
95°
62°
6
94°
62°
7
95°
64°
8
97°
66°
9
99°
67°
10
99°
66°
11
98°
64°
12
97°
61°
13
94°
61°
14
94°
59°
15
93°
59°
16
93°
60°
17
94°
62°
18
94°
66°
19
96°
68°
20
99°
69°
21
100°
67°
22
100°
63°
23
99°
64°
24
98°
62°
25
96°
61°
26
93°
60°
27
93°
58°
28
92°
58°
29
92°
59°
30
93°
61°
31
94°
65°
1
97°
66°
2
98°
66°
3
99°
65°
4
98°
65°
5
98°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Arrowhead
Arrowhead's August 2026 forecast shows daily high temperatures ranging from 92° to 100°, with overnight lows between 58° and 69°. The average high for August is 96° with an average low of 63°. 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 Arrowhead. See also: September | October | November.