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
68°
57°
20
64°
57°
21
64°
51°
22
66°
47°
23
64°
50°
24
66°
48°
25
68°
41°
26
72°
39°
27
75°
46°
28
N/A
29
75°
47°
30
74°
57°
1
81°
55°
2
66°
43°
3
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Chatham
Chatham's September 2026 forecast shows daily high temperatures ranging from 65° to 81°, with overnight lows between 43° and 55°. The average high for September is 71° with an average low of 48°. 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.
