S
M
T
W
T
F
S
30
90°
67°
31
85°
61°
1
81°
52°
2
86°
60°
3
93°
69°
4
89°
61°
5
90°
72°
6
84°
65°
7
78°
65°
8
85°
58°
9
77°
54°
10
84°
51°
11
90°
61°
12
69°
51°
13
69°
46°
14
66°
54°
15
70°
50°
16
70°
44°
17
69°
56°
18
62°
58°
19
60°
57°
20
61°
54°
21
58°
50°
22
66°
50°
23
70°
54°
24
61°
59°
25
64°
58°
26
65°
59°
27
70°
56°
28
74°
60°
29
72°
56°
30
80°
51°
1
64°
42°
2
57°
35°
3
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clark
Clark's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Clark. See also: October | November | December.