S
M
T
W
T
F
S
26
86°
62°
27
85°
63°
28
84°
62°
29
86°
63°
30
86°
64°
31
85°
64°
1
86°
61°
2
83°
55°
3
77°
54°
4
75°
53°
5
77°
55°
6
79°
54°
7
82°
58°
8
85°
60°
9
85°
59°
10
84°
60°
11
84°
62°
12
84°
58°
13
Hist. Avg.
79°
64°
14
Hist. Avg.
79°
64°
15
Hist. Avg.
79°
64°
16
Hist. Avg.
79°
64°
17
Hist. Avg.
79°
64°
18
Hist. Avg.
79°
64°
19
Hist. Avg.
79°
64°
20
Hist. Avg.
79°
64°
21
Hist. Avg.
79°
64°
22
Hist. Avg.
78°
63°
23
Hist. Avg.
78°
63°
24
Hist. Avg.
78°
63°
25
Hist. Avg.
78°
63°
26
Hist. Avg.
78°
63°
27
Hist. Avg.
78°
62°
28
Hist. Avg.
78°
62°
29
Hist. Avg.
78°
62°
30
Hist. Avg.
78°
62°
31
Hist. Avg.
77°
62°
1
Hist. Avg.
77°
61°
2
Hist. Avg.
77°
61°
3
Hist. Avg.
77°
61°
4
Hist. Avg.
76°
60°
5
Hist. Avg.
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Decatur
Decatur's August 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 53° and 64°. The average high for August is 83° with an average low of 59°. 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 Decatur. See also: September | October | November.
