S
M
T
W
T
F
S
26
86°
63°
27
87°
64°
28
87°
63°
29
86°
64°
30
87°
65°
31
87°
65°
1
85°
63°
2
80°
60°
3
80°
58°
4
78°
62°
5
78°
58°
6
79°
57°
7
80°
60°
8
83°
62°
9
85°
64°
10
85°
64°
11
84°
63°
12
84°
63°
13
85°
64°
14
86°
62°
15
85°
64°
16
81°
64°
17
80°
63°
18
86°
65°
19
85°
61°
20
81°
56°
21
81°
54°
22
78°
54°
23
78°
56°
24
79°
56°
25
80°
55°
26
78°
60°
27
78°
56°
28
79°
54°
29
77°
54°
30
77°
53°
31
76°
52°
1
76°
53°
2
77°
54°
3
75°
56°
4
75°
53°
5
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sunbury
Sunbury's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 52° and 65°. The average high for August is 81° with an average low of 59°. 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 Sunbury. See also: September | October | November.