S
M
T
W
T
F
S
30
88°
66°
31
88°
64°
1
88°
64°
2
86°
66°
3
88°
72°
4
93°
70°
5
86°
68°
6
79°
64°
7
81°
66°
8
82°
64°
9
81°
54°
10
81°
50°
11
82°
59°
12
73°
50°
13
68°
46°
14
64°
54°
15
72°
54°
16
73°
50°
17
73°
63°
18
72°
63°
19
64°
59°
20
63°
57°
21
57°
55°
22
63°
54°
23
70°
50°
24
61°
57°
25
63°
57°
26
65°
61°
27
69°
57°
28
69°
60°
29
66°
54°
30
69°
54°
1
69°
44°
2
68°
49°
3
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sibley
Sibley's September 2026 forecast shows daily high temperatures ranging from 65° to 69°, with overnight lows between 44° and 61°. The average high for September is 68° with an average low of 53°. 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 Sibley. See also: October | November | December.
