S
M
T
W
T
F
S
30
77°
41°
31
78°
44°
1
82°
47°
2
84°
45°
3
85°
41°
4
85°
43°
5
83°
39°
6
76°
38°
7
82°
44°
8
79°
34°
9
72°
35°
10
74°
43°
11
73°
44°
12
74°
43°
13
73°
42°
14
72°
34°
15
69°
34°
16
Hist. Avg.
76°
41°
17
Hist. Avg.
76°
41°
18
Hist. Avg.
75°
41°
19
Hist. Avg.
75°
41°
20
Hist. Avg.
75°
40°
21
Hist. Avg.
74°
40°
22
Hist. Avg.
74°
40°
23
Hist. Avg.
74°
40°
24
Hist. Avg.
73°
39°
25
Hist. Avg.
73°
39°
26
Hist. Avg.
72°
39°
27
Hist. Avg.
72°
38°
28
Hist. Avg.
72°
38°
29
Hist. Avg.
71°
38°
30
Hist. Avg.
71°
38°
1
Hist. Avg.
70°
37°
2
Hist. Avg.
70°
37°
3
Hist. Avg.
69°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Sisters
Sisters's September 2026 forecast shows daily high temperatures ranging from 69° to 85°, with overnight lows between 34° and 47°. The average high for September is 78° with an average low of 41°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Sisters. See also: October | November | December.
