S
M
T
W
T
F
S
30
79°
63°
31
75°
57°
1
73°
58°
2
72°
57°
3
71°
57°
4
72°
60°
5
73°
63°
6
73°
64°
7
76°
62°
8
78°
61°
9
78°
60°
10
73°
62°
11
78°
62°
12
79°
61°
13
77°
62°
14
76°
60°
15
78°
52°
16
75°
52°
17
69°
51°
18
69°
53°
19
70°
56°
20
71°
58°
21
74°
58°
22
69°
57°
23
74°
59°
24
75°
57°
25
73°
58°
26
74°
58°
27
75°
54°
28
74°
47°
29
73°
48°
30
62°
53°
1
63°
48°
2
67°
53°
3
64°
53°
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 62° to 79°, with overnight lows between 47° and 64°. The average high for September is 73° 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.
