S
M
T
W
T
F
S
26
81°
65°
27
81°
65°
28
80°
64°
29
79°
62°
30
74°
59°
31
72°
57°
1
73°
57°
2
73°
59°
3
75°
63°
4
75°
63°
5
76°
62°
6
75°
64°
7
75°
63°
8
74°
62°
9
74°
60°
10
73°
57°
11
76°
60°
12
79°
63°
13
80°
64°
14
81°
63°
15
80°
62°
16
77°
63°
17
81°
56°
18
76°
55°
19
72°
53°
20
70°
53°
21
71°
54°
22
72°
53°
23
72°
54°
24
74°
54°
25
76°
55°
26
76°
61°
27
78°
56°
28
75°
53°
29
69°
54°
30
71°
53°
31
73°
54°
1
76°
51°
2
70°
52°
3
69°
53°
4
73°
60°
5
72°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sherman
Sherman's August 2026 forecast shows daily high temperatures ranging from 69° to 81°, with overnight lows between 51° and 65°. The average high for August is 75° with an average low of 58°. 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 Sherman. See also: September | October | November.