S
M
T
W
T
F
S
30
81°
63°
31
71°
63°
1
68°
62°
2
73°
63°
3
76°
61°
4
79°
63°
5
72°
58°
6
68°
55°
7
N/A
8
77°
63°
9
74°
68°
10
81°
66°
11
73°
56°
12
75°
62°
13
74°
65°
14
79°
63°
15
73°
62°
16
76°
62°
17
73°
61°
18
71°
60°
19
72°
59°
20
73°
46°
21
68°
60°
22
65°
60°
23
65°
59°
24
67°
59°
25
66°
58°
26
69°
58°
27
64°
57°
28
64°
58°
29
70°
59°
30
70°
58°
1
68°
58°
2
68°
57°
3
68°
57°
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 64° to 81°, with overnight lows between 46° and 68°. The average high for September is 71° with an average low of 60°. 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.
