S
M
T
W
T
F
S
30
96°
70°
31
93°
72°
1
97°
71°
2
99°
75°
3
98°
77°
4
97°
74°
5
97°
70°
6
90°
71°
7
100°
70°
8
102°
71°
9
87°
72°
10
86°
65°
11
91°
66°
12
75°
60°
13
72°
60°
14
92°
61°
15
73°
58°
16
73°
59°
17
79°
68°
18
98°
71°
19
86°
60°
20
65°
59°
21
66°
54°
22
66°
51°
23
68°
55°
24
69°
56°
25
72°
60°
26
68°
57°
27
71°
54°
28
72°
55°
29
72°
51°
30
68°
52°
1
71°
53°
2
72°
46°
3
67°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fairbury
Fairbury's September 2026 forecast shows daily high temperatures ranging from 65° to 86°, with overnight lows between 46° and 60°. The average high for September is 70° with an average low of 54°. 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 Fairbury. See also: October | November | December.
