S
M
T
W
T
F
S
30
73°
62°
31
75°
59°
1
73°
54°
2
68°
65°
3
79°
66°
4
75°
54°
5
76°
55°
6
81°
63°
7
77°
58°
8
69°
53°
9
67°
51°
10
66°
54°
11
69°
55°
12
67°
53°
13
68°
55°
14
69°
57°
15
70°
48°
16
65°
46°
17
66°
47°
18
67°
48°
19
69°
51°
20
69°
51°
21
70°
50°
22
69°
51°
23
69°
51°
24
68°
49°
25
69°
51°
26
68°
50°
27
68°
47°
28
67°
46°
29
66°
50°
30
67°
49°
1
62°
44°
2
60°
43°
3
61°
44°
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 60° to 81°, with overnight lows between 43° and 66°. The average high for September is 69° 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.
