S
M
T
W
T
F
S
30
83°
54°
31
77°
62°
1
70°
57°
2
75°
56°
3
81°
65°
4
83°
62°
5
76°
57°
6
71°
53°
7
77°
59°
8
82°
63°
9
77°
71°
10
81°
68°
11
77°
62°
12
75°
61°
13
77°
62°
14
78°
63°
15
81°
64°
16
82°
59°
17
77°
62°
18
70°
56°
19
76°
62°
20
75°
61°
21
72°
58°
22
72°
61°
23
73°
61°
24
74°
60°
25
70°
59°
26
73°
61°
27
75°
62°
28
75°
58°
29
68°
55°
30
69°
57°
1
68°
55°
2
65°
57°
3
66°
56°
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 65° to 83°, with overnight lows between 53° and 71°. The average high for September is 75° with an average low of 60°. 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.
