S
M
T
W
T
F
S
30
84°
59°
31
77°
64°
1
69°
59°
2
76°
60°
3
81°
65°
4
85°
67°
5
76°
63°
6
72°
56°
7
81°
55°
8
82°
59°
9
81°
61°
10
86°
68°
11
79°
49°
12
75°
60°
13
74°
62°
14
77°
49°
15
71°
54°
16
75°
61°
17
79°
60°
18
78°
52°
19
72°
50°
20
72°
46°
21
70°
48°
22
71°
48°
23
70°
50°
24
74°
49°
25
65°
45°
26
65°
47°
27
66°
53°
28
71°
50°
29
64°
48°
30
64°
49°
1
65°
51°
2
66°
49°
3
68°
51°
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 64° to 79°, with overnight lows between 45° and 62°. The average high for September is 71° with an average low of 51°. 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.
