S
M
T
W
T
F
S
30
84°
54°
31
77°
58°
1
77°
59°
2
78°
61°
3
84°
63°
4
87°
61°
5
86°
53°
6
79°
52°
7
77°
52°
8
77°
54°
9
80°
59°
10
78°
54°
11
75°
50°
12
74°
49°
13
75°
53°
14
74°
50°
15
75°
48°
16
74°
47°
17
71°
47°
18
71°
48°
19
72°
47°
20
70°
47°
21
71°
48°
22
72°
47°
23
73°
51°
24
75°
53°
25
78°
54°
26
77°
47°
27
77°
47°
28
69°
53°
29
69°
49°
30
76°
50°
1
72°
51°
2
71°
48°
3
67°
49°
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 67° to 87°, with overnight lows between 47° and 63°. The average high for September is 75° with an average low of 52°. 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.
