S
M
T
W
T
F
S
30
59°
43°
31
64°
43°
1
69°
52°
2
59°
55°
3
61°
56°
4
68°
54°
5
64°
56°
6
N/A
7
62°
46°
8
59°
50°
9
61°
44°
10
66°
43°
11
65°
51°
12
73°
55°
13
77°
49°
14
72°
50°
15
67°
44°
16
68°
46°
17
73°
52°
18
74°
52°
19
69°
52°
20
72°
52°
21
72°
52°
22
65°
51°
23
65°
51°
24
68°
53°
25
74°
53°
26
73°
52°
27
66°
50°
28
70°
53°
29
68°
53°
30
76°
52°
1
74°
54°
2
77°
53°
3
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Exeter
Exeter's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 43° and 55°. The average high for September is 69° 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.
