S
M
T
W
T
F
S
26
87°
70°
27
86°
69°
28
87°
71°
29
88°
70°
30
88°
71°
31
87°
71°
1
89°
72°
2
87°
72°
3
87°
71°
4
89°
72°
5
89°
71°
6
88°
71°
7
90°
70°
8
89°
71°
9
90°
72°
10
89°
72°
11
88°
71°
12
84°
71°
13
86°
70°
14
84°
70°
15
84°
68°
16
83°
68°
17
82°
69°
18
83°
66°
19
85°
68°
20
83°
69°
21
83°
69°
22
84°
68°
23
85°
68°
24
88°
66°
25
88°
69°
26
85°
68°
27
83°
67°
28
85°
68°
29
86°
66°
30
85°
69°
31
87°
68°
1
84°
68°
2
81°
66°
3
81°
68°
4
82°
67°
5
81°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Roswell-Alpharetta
Roswell-Alpharetta's August 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 65° and 72°. The average high for August is 86° with an average low of 69°. 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 Roswell-Alpharetta. See also: September | October | November.
