S
M
T
W
T
F
S
26
96°
73°
27
95°
77°
28
90°
71°
29
84°
67°
30
86°
62°
31
78°
68°
1
76°
67°
2
81°
67°
3
85°
64°
4
88°
64°
5
86°
65°
6
75°
68°
7
90°
67°
8
88°
69°
9
90°
71°
10
91°
75°
11
94°
77°
12
88°
74°
13
94°
73°
14
92°
80°
15
89°
76°
16
90°
73°
17
82°
67°
18
84°
63°
19
81°
72°
20
84°
66°
21
86°
62°
22
85°
66°
23
81°
59°
24
82°
54°
25
86°
62°
26
91°
67°
27
84°
62°
28
86°
59°
29
86°
59°
30
93°
64°
31
98°
63°
1
99°
70°
2
99°
74°
3
98°
73°
4
99°
73°
5
100°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Bethalto
Bethalto's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Bethalto. See also: September | October | November.
