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
74°
62°
8
75°
60°
9
76°
69°
10
81°
66°
11
73°
57°
12
72°
62°
13
74°
64°
14
77°
62°
15
73°
64°
16
74°
61°
17
72°
58°
18
70°
58°
19
69°
59°
20
71°
55°
21
67°
59°
22
64°
58°
23
64°
59°
24
66°
58°
25
66°
58°
26
68°
57°
27
63°
56°
28
64°
57°
29
69°
57°
30
69°
56°
1
67°
57°
2
66°
57°
3
67°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Eastham
Eastham's September 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 55° and 69°. The average high for September is 70° 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 Eastham. See also: October | November | December.
