S
M
T
W
T
F
S
30
82°
66°
31
77°
61°
1
75°
61°
2
74°
60°
3
74°
60°
4
75°
62°
5
75°
67°
6
76°
66°
7
79°
67°
8
81°
65°
9
81°
65°
10
77°
66°
11
81°
66°
12
82°
65°
13
80°
66°
14
78°
64°
15
81°
55°
16
75°
55°
17
71°
56°
18
71°
55°
19
72°
59°
20
71°
62°
21
75°
61°
22
70°
61°
23
76°
62°
24
77°
61°
25
76°
61°
26
78°
62°
27
77°
58°
28
77°
50°
29
75°
50°
30
66°
55°
1
65°
51°
2
67°
56°
3
65°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Devon
Devon's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 50° and 67°. The average high for September is 75° with an average low of 60°. 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 Devon. See also: October | November | December.
