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
84°
58°
11
77°
48°
12
74°
62°
13
76°
59°
14
79°
49°
15
71°
54°
16
80°
61°
17
75°
60°
18
73°
52°
19
74°
50°
20
72°
53°
21
70°
51°
22
69°
51°
23
71°
50°
24
70°
54°
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 84°, with overnight lows between 45° and 62°. The average high for September is 71° with an average low of 52°. 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.
