S
M
T
W
T
F
S
26
93°
74°
27
89°
73°
28
87°
72°
29
89°
74°
30
92°
75°
31
94°
74°
1
93°
74°
2
93°
73°
3
89°
66°
4
88°
72°
5
91°
70°
6
94°
67°
7
91°
66°
8
89°
67°
9
88°
67°
10
88°
72°
11
91°
71°
12
94°
67°
13
95°
67°
14
86°
69°
15
87°
71°
16
88°
66°
17
88°
64°
18
85°
64°
19
86°
67°
20
87°
70°
21
87°
71°
22
92°
71°
23
92°
70°
24
93°
69°
25
91°
69°
26
92°
65°
27
90°
66°
28
85°
64°
29
85°
66°
30
88°
65°
31
85°
61°
1
84°
61°
2
84°
62°
3
85°
66°
4
86°
64°
5
89°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Galena
Galena's August 2026 forecast shows daily high temperatures ranging from 84° to 95°, with overnight lows between 60° and 75°. The average high for August is 89° 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 Galena. See also: September | October | November.