S
M
T
W
T
F
S
26
92°
72°
27
89°
71°
28
85°
68°
29
88°
72°
30
93°
73°
31
93°
72°
1
89°
72°
2
91°
73°
3
87°
63°
4
86°
70°
5
88°
67°
6
92°
65°
7
88°
64°
8
86°
63°
9
87°
66°
10
87°
70°
11
88°
68°
12
87°
63°
13
87°
64°
14
84°
66°
15
85°
69°
16
85°
63°
17
86°
62°
18
83°
62°
19
84°
63°
20
84°
67°
21
86°
70°
22
91°
70°
23
90°
69°
24
91°
68°
25
91°
67°
26
90°
65°
27
84°
64°
28
83°
62°
29
83°
63°
30
85°
62°
31
82°
59°
1
82°
60°
2
83°
61°
3
86°
65°
4
85°
58°
5
86°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Devon
Devon's August 2026 forecast shows daily high temperatures ranging from 82° to 93°, with overnight lows between 57° and 73°. The average high for August is 87° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Devon. See also: September | October | November.