S
M
T
W
T
F
S
30
91°
69°
31
92°
70°
1
91°
69°
2
88°
69°
3
87°
68°
4
86°
67°
5
87°
66°
6
88°
64°
7
91°
68°
8
91°
68°
9
89°
66°
10
90°
67°
11
90°
67°
12
89°
66°
13
89°
65°
14
88°
64°
15
89°
65°
16
83°
61°
17
85°
65°
18
84°
64°
19
Hist. Avg.
85°
61°
20
Hist. Avg.
85°
61°
21
Hist. Avg.
84°
60°
22
Hist. Avg.
84°
60°
23
Hist. Avg.
84°
60°
24
Hist. Avg.
83°
59°
25
Hist. Avg.
83°
59°
26
Hist. Avg.
83°
58°
27
Hist. Avg.
82°
58°
28
Hist. Avg.
82°
58°
29
Hist. Avg.
82°
57°
30
Hist. Avg.
81°
57°
1
Hist. Avg.
81°
56°
2
Hist. Avg.
80°
56°
3
Hist. Avg.
80°
56°
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 83° to 92°, with overnight lows between 61° and 70°. The average high for September is 88° with an average low of 66°. 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.
