S
M
T
W
T
F
S
26
56°
44°
27
54°
43°
28
54°
44°
29
58°
40°
30
59°
40°
31
56°
41°
1
54°
40°
2
55°
41°
3
55°
43°
4
56°
40°
5
55°
40°
6
55°
41°
7
56°
43°
8
56°
41°
9
55°
44°
10
56°
45°
11
60°
41°
12
56°
43°
13
56°
41°
14
57°
41°
15
56°
44°
16
56°
45°
17
57°
42°
18
60°
41°
19
56°
45°
20
57°
41°
21
57°
41°
22
58°
42°
23
57°
41°
24
58°
42°
25
57°
41°
26
58°
42°
27
57°
41°
28
57°
42°
29
58°
40°
30
58°
41°
31
61°
42°
1
58°
42°
2
58°
44°
3
60°
41°
4
58°
46°
5
63°
47°
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 54° to 63°, with overnight lows between 40° and 47°. The average high for August is 57° with an average low of 42°. 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.