S
M
T
W
T
F
S
30
72°
55°
31
76°
55°
1
77°
56°
2
74°
54°
3
67°
51°
4
65°
45°
5
67°
44°
6
67°
42°
7
66°
52°
8
70°
53°
9
74°
54°
10
77°
49°
11
77°
42°
12
64°
45°
13
64°
43°
14
65°
53°
15
73°
53°
16
74°
52°
17
74°
52°
18
72°
51°
19
73°
49°
20
74°
40°
21
68°
39°
22
59°
39°
23
60°
37°
24
60°
47°
25
67°
46°
26
71°
39°
27
67°
36°
28
57°
35°
29
58°
38°
30
60°
39°
1
60°
38°
2
61°
43°
3
64°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Knowlton
Knowlton's September 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 35° and 56°. The average high for September is 68° with an average low of 46°. 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 Knowlton. See also: October | November | December.
