S
M
T
W
T
F
S
30
72°
66°
31
79°
68°
1
88°
71°
2
90°
70°
3
81°
64°
4
79°
64°
5
75°
57°
6
76°
53°
7
75°
54°
8
79°
53°
9
80°
68°
10
79°
56°
11
74°
52°
12
78°
58°
13
82°
51°
14
70°
46°
15
76°
52°
16
76°
62°
17
70°
60°
18
76°
50°
19
67°
60°
20
69°
47°
21
66°
47°
22
65°
52°
23
65°
54°
24
65°
50°
25
67°
50°
26
70°
51°
27
69°
52°
28
70°
53°
29
69°
53°
30
69°
52°
1
67°
52°
2
68°
50°
3
64°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chatham
Chatham's September 2026 forecast shows daily high temperatures ranging from 64° to 70°, with overnight lows between 47° and 60°. The average high for September is 67° 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 Chatham. See also: October | November | December.
