S
M
T
W
T
F
S
26
47°
27°
27
48°
29°
28
43°
28°
29
48°
27°
30
47°
29°
1
48°
30°
2
47°
29°
3
46°
26°
4
45°
29°
5
39°
28°
6
40°
30°
7
45°
31°
8
45°
23°
9
39°
23°
10
39°
22°
11
40°
22°
12
43°
25°
13
44°
27°
14
41°
25°
15
41°
24°
16
42°
25°
17
43°
24°
18
47°
31°
19
45°
32°
20
44°
34°
21
44°
30°
22
45°
27°
23
43°
28°
24
44°
25°
25
46°
27°
26
48°
31°
27
51°
31°
28
54°
35°
29
51°
33°
30
51°
29°
31
52°
30°
1
49°
29°
2
51°
34°
3
58°
37°
4
59°
28°
5
50°
33°
6
54°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Crater Lake
Crater Lake's May 2026 forecast shows daily high temperatures ranging from 39° to 59°, with overnight lows between 22° and 37°. The average high for May is 46° with an average low of 29°. 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 Crater Lake. See also: June | July | August.
