S
M
T
W
T
F
S
26
93°
71°
27
94°
72°
28
94°
72°
29
93°
71°
30
94°
72°
31
93°
71°
1
90°
70°
2
86°
67°
3
84°
70°
4
85°
70°
5
84°
69°
6
86°
70°
7
86°
69°
8
87°
68°
9
86°
69°
10
86°
69°
11
87°
70°
12
86°
69°
13
87°
68°
14
94°
68°
15
93°
68°
16
89°
66°
17
87°
67°
18
90°
68°
19
87°
63°
20
86°
61°
21
85°
60°
22
84°
60°
23
85°
61°
24
85°
60°
25
86°
62°
26
85°
63°
27
88°
63°
28
90°
66°
29
91°
67°
30
92°
66°
31
92°
66°
1
89°
65°
2
88°
64°
3
84°
59°
4
83°
59°
5
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mercer
Mercer's August 2026 forecast shows daily high temperatures ranging from 83° to 94°, with overnight lows between 59° and 72°. The average high for August is 88° with an average low of 67°. 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 Mercer. See also: September | October | November.
