S
M
T
W
T
F
S
26
95°
75°
27
95°
73°
28
92°
72°
29
87°
66°
30
87°
63°
31
78°
63°
1
74°
69°
2
81°
67°
3
86°
62°
4
88°
63°
5
88°
63°
6
77°
70°
7
88°
70°
8
90°
70°
9
91°
72°
10
95°
73°
11
96°
75°
12
93°
74°
13
88°
73°
14
89°
72°
15
88°
69°
16
84°
64°
17
85°
64°
18
88°
65°
19
84°
66°
20
84°
64°
21
86°
62°
22
90°
69°
23
91°
69°
24
83°
64°
25
84°
67°
26
89°
68°
27
89°
68°
28
88°
67°
29
84°
65°
30
79°
65°
31
79°
63°
1
80°
65°
2
81°
65°
3
85°
66°
4
86°
66°
5
86°
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 79° to 96°, with overnight lows between 62° and 75°. The average high for August is 87° 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 Carbondale. See also: September | October | November.