S
M
T
W
T
F
S
26
82°
56°
27
85°
55°
28
60°
49°
29
63°
43°
30
66°
40°
1
65°
43°
2
64°
41°
3
81°
59°
4
81°
61°
5
66°
45°
6
55°
39°
7
66°
50°
8
77°
51°
9
78°
56°
10
71°
53°
11
66°
47°
12
75°
55°
13
79°
59°
14
79°
57°
15
77°
58°
16
78°
56°
17
73°
60°
18
75°
61°
19
78°
59°
20
74°
57°
21
78°
53°
22
71°
52°
23
71°
54°
24
69°
56°
25
71°
54°
26
73°
54°
27
74°
56°
28
74°
58°
29
76°
61°
30
78°
64°
31
76°
62°
1
76°
58°
2
77°
59°
3
78°
65°
4
78°
65°
5
79°
66°
6
78°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Galena
South Galena's May 2026 forecast shows daily high temperatures ranging from 55° to 81°, with overnight lows between 39° and 66°. The average high for May is 74° with an average low of 57°. 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 South Galena. See also: June | July | August.