S
M
T
W
T
F
S
30
85°
61°
31
81°
62°
1
80°
66°
2
80°
66°
3
87°
65°
4
87°
67°
5
86°
65°
6
84°
61°
7
86°
65°
8
83°
59°
9
79°
57°
10
78°
57°
11
78°
58°
12
82°
56°
13
81°
63°
14
84°
58°
15
77°
56°
16
75°
57°
17
76°
56°
18
77°
60°
19
82°
54°
20
81°
58°
21
80°
60°
22
83°
53°
23
77°
53°
24
76°
52°
25
76°
52°
26
75°
59°
27
80°
58°
28
79°
59°
29
81°
52°
30
77°
52°
1
73°
58°
2
79°
57°
3
80°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Falmouth
Falmouth's September 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 52° and 67°. The average high for September is 80° with an average low of 58°. 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.
