S
M
T
W
T
F
S
30
81°
70°
31
91°
70°
1
93°
72°
2
93°
73°
3
93°
72°
4
93°
72°
5
90°
72°
6
84°
63°
7
82°
59°
8
86°
70°
9
81°
65°
10
79°
55°
11
81°
62°
12
82°
61°
13
81°
67°
14
86°
65°
15
74°
54°
16
72°
53°
17
74°
54°
18
72°
52°
19
71°
48°
20
72°
52°
21
76°
50°
22
72°
56°
23
73°
55°
24
78°
56°
25
79°
56°
26
79°
55°
27
78°
56°
28
79°
57°
29
79°
57°
30
77°
56°
1
75°
50°
2
67°
44°
3
64°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oglesby
Oglesby's September 2026 forecast shows daily high temperatures ranging from 64° to 86°, with overnight lows between 41° and 70°. The average high for September is 76° with an average low of 56°. 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 Oglesby. See also: October | November | December.