S
M
T
W
T
F
S
26
69°
55°
27
72°
49°
28
63°
42°
29
63°
39°
30
65°
42°
1
70°
38°
2
70°
43°
3
87°
46°
4
87°
59°
5
59°
45°
6
62°
44°
7
77°
42°
8
76°
54°
9
88°
52°
10
72°
52°
11
81°
48°
12
90°
55°
13
81°
58°
14
90°
57°
15
91°
65°
16
95°
62°
17
91°
71°
18
92°
52°
19
62°
48°
20
64°
49°
21
68°
55°
22
77°
61°
23
74°
57°
24
81°
59°
25
87°
60°
26
85°
61°
27
81°
62°
28
71°
61°
29
80°
63°
30
83°
58°
31
77°
56°
1
76°
57°
2
79°
56°
3
80°
59°
4
81°
61°
5
83°
60°
6
85°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Galva
Galva's May 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 56° and 63°. The average high for May is 81° 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 May weather will actually feel in Galva. See also: June | July | August.