S
M
T
W
T
F
S
26
90°
50°
27
90°
54°
28
86°
54°
29
88°
50°
30
90°
52°
31
95°
54°
1
84°
55°
2
79°
45°
3
81°
43°
4
86°
48°
5
97°
54°
6
100°
61°
7
100°
59°
8
95°
59°
9
93°
54°
10
90°
54°
11
90°
54°
12
84°
54°
13
84°
50°
14
86°
54°
15
86°
55°
16
88°
59°
17
90°
59°
18
93°
57°
19
95°
52°
20
97°
61°
21
91°
66°
22
90°
61°
23
84°
48°
24
88°
52°
25
93°
55°
26
91°
57°
27
84°
55°
28
82°
48°
29
70°
45°
30
79°
39°
31
88°
45°
1
77°
55°
2
61°
50°
3
63°
43°
4
61°
41°
5
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sisters
Sisters's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Sisters. See also: September | October | November.
