S
M
T
W
T
F
S
26
89°
71°
27
88°
72°
28
89°
71°
29
88°
70°
30
89°
71°
31
88°
71°
1
89°
70°
2
88°
71°
3
84°
70°
4
89°
71°
5
86°
70°
6
85°
71°
7
85°
71°
8
84°
70°
9
86°
70°
10
87°
71°
11
86°
70°
12
84°
70°
13
85°
69°
14
86°
65°
15
89°
70°
16
90°
69°
17
86°
68°
18
85°
69°
19
84°
68°
20
88°
66°
21
86°
65°
22
83°
64°
23
82°
63°
24
83°
63°
25
84°
64°
26
88°
64°
27
87°
66°
28
88°
66°
29
88°
68°
30
89°
67°
31
88°
68°
1
87°
66°
2
86°
64°
3
86°
67°
4
85°
63°
5
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Alpharetta
Alpharetta's August 2026 forecast shows daily high temperatures ranging from 82° to 90°, with overnight lows between 63° and 72°. The average high for August is 86° with an average low of 68°. 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 Alpharetta. See also: September | October | November.
