S
M
T
W
T
F
S
26
84°
68°
27
82°
61°
28
77°
65°
29
81°
66°
30
80°
63°
31
80°
58°
1
78°
59°
2
78°
58°
3
77°
59°
4
78°
58°
5
78°
58°
6
79°
60°
7
79°
60°
8
80°
66°
9
82°
67°
10
83°
64°
11
84°
66°
12
85°
66°
13
82°
60°
14
86°
58°
15
77°
58°
16
78°
61°
17
78°
58°
18
79°
57°
19
76°
56°
20
76°
58°
21
77°
59°
22
77°
59°
23
76°
60°
24
77°
60°
25
78°
61°
26
76°
65°
27
80°
66°
28
83°
63°
29
84°
56°
30
82°
59°
31
75°
55°
1
75°
56°
2
74°
62°
3
80°
55°
4
79°
55°
5
74°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Pontiac
Pontiac's August 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 55° and 68°. The average high for August is 79° with an average low of 60°. 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 Pontiac. See also: September | October | November.
