S
M
T
W
T
F
S
30
71°
49°
31
70°
48°
1
72°
49°
2
74°
52°
3
73°
53°
4
72°
48°
5
71°
47°
6
69°
48°
7
70°
50°
8
73°
48°
9
73°
52°
10
72°
52°
11
73°
53°
12
73°
48°
13
70°
46°
14
67°
50°
15
66°
51°
16
67°
52°
17
66°
52°
18
71°
51°
19
70°
51°
20
70°
52°
21
71°
48°
22
70°
45°
23
65°
44°
24
64°
44°
25
65°
47°
26
66°
47°
27
67°
46°
28
63°
50°
29
66°
49°
30
67°
49°
1
66°
48°
2
66°
48°
3
66°
49°
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 63° to 74°, with overnight lows between 44° and 53°. The average high for September is 69° with an average low of 49°. 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.
