S
M
T
W
T
F
S
26
45°
18°
27
43°
21°
28
49°
16°
29
50°
23°
30
57°
23°
1
62°
19°
2
65°
23°
3
67°
24°
4
68°
24°
5
61°
29°
6
64°
25°
7
64°
30°
8
65°
26°
9
63°
23°
10
71°
24°
11
73°
30°
12
79°
28°
13
69°
30°
14
60°
23°
15
57°
22°
16
47°
20°
17
44°
14°
18
52°
22°
19
55°
17°
20
58°
21°
21
60°
28°
22
64°
22°
23
69°
24°
24
71°
31°
25
75°
30°
26
65°
40°
27
71°
37°
28
77°
39°
29
70°
41°
30
58°
36°
31
61°
36°
1
69°
40°
2
72°
37°
3
75°
38°
4
72°
41°
5
72°
42°
6
71°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Galena
Galena's May 2026 forecast shows daily high temperatures ranging from 58° to 77°, with overnight lows between 36° and 42°. The average high for May is 69° with an average low of 39°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Galena. See also: June | July | August.
