S
M
T
W
T
F
S
26
83°
65°
27
83°
65°
28
84°
66°
29
82°
66°
30
82°
63°
31
84°
61°
1
82°
60°
2
82°
65°
3
83°
66°
4
83°
65°
5
84°
65°
6
86°
66°
7
83°
66°
8
82°
65°
9
84°
64°
10
84°
62°
11
84°
65°
12
87°
65°
13
83°
63°
14
84°
64°
15
86°
65°
16
87°
64°
17
86°
64°
18
85°
62°
19
84°
58°
20
81°
59°
21
80°
58°
22
81°
58°
23
81°
59°
24
82°
58°
25
81°
58°
26
81°
57°
27
82°
58°
28
82°
58°
29
84°
59°
30
83°
58°
31
85°
58°
1
84°
60°
2
85°
62°
3
84°
57°
4
79°
56°
5
82°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Three Sisters Mountain
Three Sisters Mountain's August 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 56° and 66°. The average high for August is 83° with an average low of 62°. 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 Three Sisters Mountain. See also: September | October | November.
