S
M
T
W
T
F
S
26
59°
50°
27
58°
50°
28
59°
48°
29
58°
43°
30
57°
45°
1
57°
50°
2
59°
51°
3
59°
51°
4
58°
50°
5
60°
52°
6
63°
51°
7
57°
48°
8
62°
47°
9
62°
48°
10
61°
47°
11
63°
47°
12
62°
46°
13
61°
47°
14
62°
47°
15
61°
48°
16
61°
49°
17
64°
48°
18
57°
43°
19
58°
44°
20
64°
48°
21
65°
49°
22
64°
47°
23
62°
48°
24
66°
49°
25
64°
49°
26
63°
48°
27
66°
50°
28
66°
49°
29
65°
48°
30
65°
49°
31
66°
50°
1
66°
49°
2
65°
48°
3
67°
49°
4
66°
47°
5
65°
46°
6
62°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Klamath
Klamath's May 2026 forecast shows daily high temperatures ranging from 57° to 67°, with overnight lows between 43° and 52°. The average high for May is 63° with an average low of 48°. 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 Klamath. See also: June | July | August.