S
M
T
W
T
F
S
26
35°
14°
27
35°
18°
28
39°
11°
29
37°
21°
30
42°
15°
1
52°
18°
2
57°
21°
3
58°
26°
4
56°
26°
5
42°
22°
6
52°
16°
7
54°
29°
8
58°
27°
9
54°
28°
10
63°
25°
11
69°
29°
12
69°
28°
13
72°
31°
14
54°
28°
15
55°
25°
16
49°
28°
17
39°
24°
18
39°
23°
19
49°
16°
20
50°
26°
21
41°
26°
22
51°
21°
23
59°
31°
24
63°
33°
25
64°
35°
26
58°
37°
27
61°
34°
28
63°
36°
29
62°
34°
30
55°
33°
31
64°
36°
1
61°
34°
2
65°
36°
3
64°
36°
4
63°
35°
5
62°
34°
6
57°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Yellowstone Lake
Yellowstone Lake's May 2026 forecast shows daily high temperatures ranging from 55° to 65°, with overnight lows between 33° and 37°. The average high for May is 62° with an average low of 35°. 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 Yellowstone Lake. See also: June | July | August.
