S
M
T
W
T
F
S
30
73°
65°
31
74°
66°
1
78°
63°
2
74°
62°
3
77°
60°
4
74°
59°
5
73°
59°
6
76°
64°
7
78°
64°
8
78°
63°
9
77°
64°
10
76°
64°
11
75°
63°
12
78°
63°
13
77°
62°
14
77°
63°
15
76°
63°
16
77°
57°
17
75°
59°
18
68°
62°
19
74°
61°
20
76°
62°
21
75°
61°
22
74°
55°
23
73°
55°
24
Hist. Avg.
68°
52°
25
Hist. Avg.
68°
52°
26
Hist. Avg.
67°
51°
27
Hist. Avg.
67°
51°
28
Hist. Avg.
66°
50°
29
Hist. Avg.
66°
50°
30
Hist. Avg.
66°
50°
1
Hist. Avg.
66°
49°
2
Hist. Avg.
65°
49°
3
Hist. Avg.
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Falmouth
Falmouth's September 2026 forecast shows daily high temperatures ranging from 68° to 78°, with overnight lows between 55° and 66°. The average high for September is 75° with an average low of 62°. 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 Falmouth. See also: October | November | December.
