S
M
T
W
T
F
S
30
83°
54°
31
77°
53°
1
75°
54°
2
76°
59°
3
76°
54°
4
78°
61°
5
78°
60°
6
81°
55°
7
79°
53°
8
73°
52°
9
73°
52°
10
74°
58°
11
75°
51°
12
78°
51°
13
72°
50°
14
71°
56°
15
75°
58°
16
77°
48°
17
79°
48°
18
69°
47°
19
68°
48°
20
69°
48°
21
69°
49°
22
66°
48°
23
66°
51°
24
68°
52°
25
69°
51°
26
74°
53°
27
73°
50°
28
74°
44°
29
66°
44°
30
66°
51°
1
65°
52°
2
70°
51°
3
71°
49°
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 65° to 83°, with overnight lows between 44° and 61°. The average high for September is 73° 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.
