S
M
T
W
T
F
S
30
84°
62°
31
82°
56°
1
76°
56°
2
76°
55°
3
75°
55°
4
76°
58°
5
78°
62°
6
78°
63°
7
79°
62°
8
81°
60°
9
82°
60°
10
81°
61°
11
83°
61°
12
82°
60°
13
81°
60°
14
80°
56°
15
82°
49°
16
74°
49°
17
71°
50°
18
72°
50°
19
71°
54°
20
73°
57°
21
71°
56°
22
72°
54°
23
76°
56°
24
78°
55°
25
79°
55°
26
79°
56°
27
78°
54°
28
78°
45°
29
76°
46°
30
65°
49°
1
66°
50°
2
67°
52°
3
66°
47°
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 84°, with overnight lows between 45° and 63°. The average high for September is 76° with an average low of 55°. 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.
