S
M
T
W
T
F
S
30
77°
51°
31
69°
51°
1
69°
58°
2
70°
55°
3
71°
52°
4
73°
58°
5
76°
56°
6
77°
49°
7
67°
49°
8
67°
47°
9
68°
49°
10
72°
53°
11
72°
48°
12
66°
48°
13
65°
47°
14
66°
54°
15
71°
53°
16
72°
46°
17
70°
44°
18
63°
43°
19
63°
45°
20
64°
50°
21
61°
50°
22
62°
45°
23
62°
47°
24
61°
44°
25
64°
52°
26
67°
52°
27
68°
43°
28
67°
42°
29
60°
49°
30
61°
49°
1
59°
50°
2
60°
47°
3
59°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Blue Knob
Blue Knob's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 41° and 58°. The average high for September is 67° with an average low of 49°. 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 Blue Knob. See also: October | November | December.
