S
M
T
W
T
F
S
30
79°
58°
31
82°
49°
1
72°
49°
2
70°
55°
3
71°
58°
4
78°
49°
5
80°
46°
6
70°
47°
7
70°
51°
8
71°
54°
9
69°
51°
10
69°
54°
11
68°
51°
12
68°
46°
13
67°
44°
14
66°
46°
15
67°
51°
16
65°
55°
17
73°
55°
18
75°
53°
19
75°
51°
20
70°
46°
21
71°
47°
22
66°
45°
23
63°
41°
24
64°
42°
25
64°
44°
26
62°
42°
27
61°
40°
28
Hist. Avg.
65°
43°
29
Hist. Avg.
64°
42°
30
Hist. Avg.
64°
42°
1
Hist. Avg.
64°
42°
2
Hist. Avg.
63°
41°
3
Hist. Avg.
63°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fairhaven
Fairhaven's September 2026 forecast shows daily high temperatures ranging from 61° to 82°, with overnight lows between 40° and 58°. The average high for September is 70° with an average low of 49°. 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.
