S
M
T
W
T
F
S
30
72°
51°
31
71°
52°
1
70°
50°
2
70°
52°
3
71°
53°
4
70°
54°
5
69°
52°
6
70°
51°
7
68°
50°
8
67°
49°
9
67°
49°
10
68°
55°
11
68°
50°
12
69°
49°
13
71°
48°
14
70°
52°
15
70°
52°
16
67°
47°
17
66°
46°
18
70°
47°
19
71°
53°
20
70°
53°
21
71°
52°
22
69°
51°
23
71°
48°
24
67°
46°
25
65°
50°
26
66°
43°
27
69°
42°
28
60°
41°
29
60°
42°
30
63°
48°
1
60°
41°
2
58°
39°
3
Hist. Avg.
64°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yarmouth
Yarmouth's September 2026 forecast shows daily high temperatures ranging from 58° to 72°, with overnight lows between 39° and 55°. The average high for September is 68° 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 Yarmouth. See also: October | November | December.
