S
M
T
W
T
F
S
30
88°
69°
31
91°
72°
1
96°
71°
2
95°
70°
3
95°
73°
4
95°
73°
5
91°
72°
6
82°
68°
7
82°
64°
8
91°
64°
9
77°
68°
10
81°
61°
11
81°
57°
12
79°
61°
13
72°
55°
14
77°
55°
15
86°
63°
16
73°
63°
17
86°
68°
18
79°
66°
19
82°
68°
20
71°
60°
21
64°
55°
22
63°
49°
23
67°
53°
24
68°
55°
25
68°
54°
26
65°
54°
27
69°
52°
28
69°
53°
29
70°
52°
30
72°
53°
1
71°
53°
2
70°
48°
3
71°
55°
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 63° to 72°, with overnight lows between 48° and 60°. The average high for September is 68° with an average low of 53°. 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.
