S
M
T
W
T
F
S
30
62°
53°
31
66°
51°
1
66°
52°
2
67°
50°
3
63°
50°
4
61°
48°
5
61°
49°
6
62°
48°
7
61°
49°
8
61°
48°
9
62°
53°
10
61°
54°
11
62°
52°
12
61°
51°
13
61°
55°
14
66°
55°
15
68°
54°
16
68°
54°
17
67°
55°
18
67°
51°
19
68°
53°
20
67°
54°
21
67°
54°
22
66°
49°
23
67°
53°
24
64°
53°
25
61°
52°
26
61°
51°
27
60°
50°
28
61°
52°
29
59°
51°
30
60°
52°
1
65°
50°
2
64°
50°
3
67°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fairhaven
Fairhaven's September 2026 forecast shows daily high temperatures ranging from 59° to 68°, with overnight lows between 48° and 55°. The average high for September is 64° with an average low of 52°. 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 Fairhaven. See also: October | November | December.
