S
M
T
W
T
F
S
26
94°
76°
27
96°
75°
28
97°
76°
29
96°
77°
30
93°
76°
31
92°
74°
1
94°
75°
2
84°
71°
3
87°
70°
4
91°
66°
5
93°
71°
6
93°
71°
7
92°
72°
8
91°
72°
9
92°
70°
10
88°
71°
11
90°
70°
12
88°
69°
13
88°
69°
14
90°
71°
15
90°
69°
16
89°
69°
17
94°
68°
18
94°
71°
19
93°
72°
20
95°
71°
21
94°
71°
22
94°
70°
23
93°
71°
24
93°
71°
25
92°
70°
26
94°
71°
27
93°
71°
28
94°
70°
29
94°
69°
30
93°
70°
31
92°
70°
1
91°
69°
2
93°
70°
3
94°
70°
4
92°
69°
5
92°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Decatur
Decatur's August 2026 forecast shows daily high temperatures ranging from 88° to 95°, with overnight lows between 66° and 72°. The average high for August is 92° with an average low of 70°. 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.
