S
M
T
W
T
F
S
30
73°
52°
31
73°
48°
1
77°
56°
2
75°
58°
3
78°
64°
4
75°
60°
5
69°
54°
6
70°
51°
7
76°
50°
8
69°
50°
9
69°
51°
10
70°
49°
11
65°
45°
12
75°
44°
13
76°
63°
14
63°
44°
15
66°
40°
16
72°
56°
17
69°
53°
18
65°
43°
19
61°
38°
20
57°
46°
21
57°
43°
22
63°
39°
23
66°
38°
24
69°
38°
25
74°
52°
26
70°
53°
27
62°
52°
28
58°
50°
29
59°
51°
30
67°
52°
1
70°
57°
2
67°
49°
3
64°
47°
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 58° to 74°, with overnight lows between 47° and 57°. The average high for September is 66° with an average low of 51°. 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.
