S
M
T
W
T
F
S
26
54°
40°
27
56°
37°
28
57°
36°
29
60°
40°
30
60°
39°
1
64°
34°
2
72°
40°
3
74°
50°
4
68°
50°
5
65°
43°
6
62°
44°
7
75°
42°
8
78°
52°
9
74°
52°
10
80°
47°
11
89°
52°
12
90°
62°
13
79°
43°
14
79°
46°
15
81°
50°
16
70°
37°
17
60°
37°
18
61°
27°
19
65°
31°
20
73°
38°
21
75°
37°
22
72°
40°
23
77°
40°
24
75°
36°
25
71°
37°
26
72°
35°
27
66°
35°
28
65°
30°
29
66°
32°
30
70°
35°
31
75°
39°
1
78°
41°
2
79°
42°
3
79°
43°
4
80°
43°
5
71°
40°
6
74°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Koosharem
Koosharem's May 2026 forecast shows daily high temperatures ranging from 60° to 81°, with overnight lows between 27° and 50°. The average high for May is 73° with an average low of 38°. 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 Koosharem. See also: June | July | August.