S
M
T
W
T
F
S
26
88°
77°
27
88°
78°
28
89°
77°
29
88°
79°
30
89°
79°
31
90°
78°
1
89°
79°
2
88°
78°
3
89°
79°
4
90°
79°
5
88°
78°
6
91°
79°
7
91°
79°
8
92°
78°
9
87°
79°
10
91°
77°
11
90°
77°
12
92°
78°
13
91°
77°
14
89°
76°
15
90°
77°
16
89°
77°
17
90°
76°
18
92°
76°
19
92°
77°
20
93°
76°
21
92°
76°
22
90°
77°
23
90°
76°
24
89°
76°
25
89°
77°
26
90°
76°
27
89°
74°
28
89°
76°
29
90°
76°
30
90°
74°
31
93°
76°
1
92°
76°
2
91°
75°
3
90°
76°
4
89°
75°
5
89°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sheridan
Sheridan's August 2026 forecast shows daily high temperatures ranging from 87° to 93°, with overnight lows between 74° and 79°. The average high for August is 90° with an average low of 77°. 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 Sheridan. See also: September | October | November.