S
M
T
W
T
F
S
30
57°
50°
31
55°
50°
1
64°
45°
2
67°
41°
3
71°
38°
4
70°
38°
5
67°
38°
6
61°
52°
7
64°
51°
8
56°
54°
9
58°
47°
10
64°
44°
11
66°
39°
12
67°
36°
13
64°
40°
14
65°
42°
15
61°
51°
16
55°
48°
17
60°
48°
18
55°
49°
19
57°
48°
20
55°
48°
21
55°
44°
22
53°
45°
23
54°
43°
24
54°
45°
25
55°
44°
26
54°
45°
27
55°
44°
28
47°
40°
29
49°
41°
30
50°
40°
1
48°
39°
2
48°
38°
3
47°
37°
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 47° to 61°, with overnight lows between 37° and 51°. The average high for September is 53° with an average low of 44°. 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.
