S
M
T
W
T
F
S
30
84°
67°
31
79°
62°
1
78°
59°
2
78°
59°
3
80°
66°
4
84°
66°
5
83°
67°
6
86°
65°
7
82°
63°
8
85°
64°
9
85°
64°
10
84°
62°
11
85°
64°
12
83°
63°
13
84°
63°
14
85°
54°
15
81°
52°
16
73°
52°
17
73°
54°
18
75°
61°
19
80°
61°
20
78°
60°
21
76°
59°
22
77°
56°
23
80°
58°
24
81°
60°
25
82°
59°
26
82°
60°
27
81°
51°
28
79°
49°
29
70°
55°
30
68°
53°
1
69°
55°
2
68°
54°
3
68°
50°
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 68° to 86°, with overnight lows between 49° and 67°. The average high for September is 79° with an average low of 59°. 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.
