S
M
T
W
T
F
S
30
78°
57°
31
71°
64°
1
84°
68°
2
74°
65°
3
84°
65°
4
79°
57°
5
76°
56°
6
74°
52°
7
77°
52°
8
79°
60°
9
82°
67°
10
80°
59°
11
71°
54°
12
72°
52°
13
76°
56°
14
76°
53°
15
74°
55°
16
75°
56°
17
78°
53°
18
70°
48°
19
76°
51°
20
77°
54°
21
76°
55°
22
76°
56°
23
71°
54°
24
73°
50°
25
72°
50°
26
74°
55°
27
72°
54°
28
68°
48°
29
64°
46°
30
66°
46°
1
63°
43°
2
63°
47°
3
62°
43°
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 62° to 82°, with overnight lows between 43° and 67°. The average high for September is 73° 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.
