S
M
T
W
T
F
S
30
79°
55°
31
79°
64°
1
86°
66°
2
70°
64°
3
88°
66°
4
84°
68°
5
77°
61°
6
77°
57°
7
79°
52°
8
81°
52°
9
84°
57°
10
86°
68°
11
79°
54°
12
79°
50°
13
82°
63°
14
73°
57°
15
73°
48°
16
81°
54°
17
82°
64°
18
81°
64°
19
70°
59°
20
68°
61°
21
71°
56°
22
66°
51°
23
65°
50°
24
66°
51°
25
68°
54°
26
70°
55°
27
67°
53°
28
69°
51°
29
71°
51°
30
72°
54°
1
71°
51°
2
72°
50°
3
68°
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 65° to 72°, with overnight lows between 50° and 56°. 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.
