S
M
T
W
T
F
S
30
82°
65°
31
77°
60°
1
76°
57°
2
76°
59°
3
78°
64°
4
83°
65°
5
83°
64°
6
84°
65°
7
79°
62°
8
84°
63°
9
84°
63°
10
83°
60°
11
79°
62°
12
78°
61°
13
82°
59°
14
84°
50°
15
78°
49°
16
71°
50°
17
71°
53°
18
72°
59°
19
75°
59°
20
74°
58°
21
74°
55°
22
77°
54°
23
80°
57°
24
81°
59°
25
81°
58°
26
80°
58°
27
80°
47°
28
78°
46°
29
67°
50°
30
66°
49°
1
67°
52°
2
66°
48°
3
66°
46°
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 66° to 84°, with overnight lows between 46° and 65°. The average high for September is 77° with an average low of 57°. 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.
