S
M
T
W
T
F
S
30
83°
58°
31
75°
57°
1
68°
60°
2
70°
62°
3
73°
63°
4
82°
59°
5
74°
55°
6
72°
51°
7
78°
57°
8
80°
55°
9
70°
62°
10
79°
59°
11
72°
54°
12
70°
50°
13
72°
53°
14
72°
54°
15
73°
56°
16
74°
53°
17
75°
50°
18
67°
49°
19
73°
54°
20
72°
53°
21
70°
52°
22
70°
53°
23
69°
53°
24
70°
52°
25
67°
51°
26
70°
52°
27
71°
53°
28
71°
50°
29
62°
48°
30
65°
48°
1
63°
46°
2
61°
47°
3
60°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Exeter
Exeter's September 2026 forecast shows daily high temperatures ranging from 60° to 82°, with overnight lows between 46° and 62°. The average high for September is 71° 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 Exeter. See also: October | November | December.
