S
M
T
W
T
F
S
30
65°
49°
31
71°
46°
1
78°
47°
2
76°
52°
3
66°
53°
4
63°
47°
5
55°
49°
6
61°
51°
7
63°
47°
8
70°
48°
9
76°
49°
10
61°
46°
11
52°
37°
12
55°
34°
13
60°
37°
14
66°
41°
15
59°
36°
16
63°
36°
17
56°
38°
18
58°
37°
19
58°
38°
20
57°
32°
21
55°
44°
22
55°
44°
23
59°
43°
24
65°
44°
25
67°
44°
26
67°
43°
27
64°
42°
28
56°
40°
29
52°
36°
30
53°
40°
1
52°
38°
2
62°
41°
3
62°
40°
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 52° to 76°, with overnight lows between 32° and 49°. The average high for September is 60° with an average low of 41°. 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.
