S
M
T
W
T
F
S
26
80°
66°
27
85°
66°
28
85°
68°
29
81°
64°
30
85°
59°
31
86°
64°
1
79°
71°
2
84°
69°
3
84°
65°
4
87°
62°
5
90°
70°
6
90°
69°
7
87°
70°
8
89°
69°
9
89°
67°
10
85°
69°
11
77°
67°
12
75°
66°
13
85°
64°
14
79°
68°
15
85°
69°
16
85°
72°
17
82°
72°
18
83°
67°
19
80°
67°
20
80°
60°
21
82°
63°
22
80°
60°
23
76°
56°
24
76°
57°
25
77°
60°
26
78°
59°
27
79°
60°
28
78°
61°
29
79°
60°
30
79°
61°
31
80°
58°
1
79°
59°
2
82°
62°
3
76°
59°
4
77°
61°
5
76°
56°
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 76° to 82°, with overnight lows between 56° and 67°. The average high for August is 79° with an average low of 60°. 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.