S
M
T
W
T
F
S
30
93°
66°
31
97°
67°
1
98°
69°
2
100°
69°
3
102°
72°
4
102°
74°
5
97°
69°
6
85°
69°
7
87°
63°
8
86°
57°
9
90°
66°
10
92°
69°
11
85°
69°
12
80°
67°
13
86°
64°
14
86°
61°
15
87°
65°
16
85°
61°
17
80°
60°
18
76°
55°
19
77°
54°
20
73°
55°
21
76°
54°
22
80°
59°
23
76°
58°
24
76°
58°
25
77°
57°
26
80°
58°
27
80°
57°
28
79°
57°
29
79°
56°
30
78°
56°
1
78°
55°
2
77°
55°
3
78°
54°
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 73° to 92°, with overnight lows between 54° and 69°. The average high for September is 81° with an average low of 59°. 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.
