S
M
T
W
T
F
S
26
96°
74°
27
96°
75°
28
97°
74°
29
94°
72°
30
95°
73°
31
94°
72°
1
92°
71°
2
90°
70°
3
86°
70°
4
88°
71°
5
88°
71°
6
93°
73°
7
94°
73°
8
94°
72°
9
92°
72°
10
89°
71°
11
92°
71°
12
91°
70°
13
92°
72°
14
94°
71°
15
94°
70°
16
93°
65°
17
91°
66°
18
92°
62°
19
84°
61°
20
85°
60°
21
84°
60°
22
84°
61°
23
91°
60°
24
88°
67°
25
91°
67°
26
93°
66°
27
93°
68°
28
92°
68°
29
93°
66°
30
92°
65°
31
91°
64°
1
91°
59°
2
83°
57°
3
81°
62°
4
88°
66°
5
89°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Carbondale
Carbondale's August 2026 forecast shows daily high temperatures ranging from 81° to 97°, with overnight lows between 57° and 75°. The average high for August is 91° with an average low of 68°. 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 Carbondale. See also: September | October | November.