S
M
T
W
T
F
S
30
97°
73°
31
96°
72°
1
95°
72°
2
94°
70°
3
94°
68°
4
93°
71°
5
93°
70°
6
94°
69°
7
93°
70°
8
90°
69°
9
93°
71°
10
93°
70°
11
92°
69°
12
91°
69°
13
86°
68°
14
87°
68°
15
86°
67°
16
88°
68°
17
87°
67°
18
86°
64°
19
85°
61°
20
84°
60°
21
83°
60°
22
84°
64°
23
86°
66°
24
87°
65°
25
89°
66°
26
88°
64°
27
88°
64°
28
86°
63°
29
88°
61°
30
82°
62°
1
Hist. Avg.
82°
57°
2
Hist. Avg.
82°
57°
3
Hist. Avg.
82°
56°
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 82° to 97°, with overnight lows between 60° and 73°. The average high for September is 89° with an average low of 67°. 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.
