S
M
T
W
T
F
S
26
68°
40°
27
60°
49°
28
59°
48°
29
66°
48°
30
74°
47°
1
71°
50°
2
74°
52°
3
80°
52°
4
81°
53°
5
66°
55°
6
59°
53°
7
64°
50°
8
64°
50°
9
68°
49°
10
67°
50°
11
71°
54°
12
83°
53°
13
60°
53°
14
63°
51°
15
53°
47°
16
52°
42°
17
63°
45°
18
65°
49°
19
67°
47°
20
69°
50°
21
63°
48°
22
64°
47°
23
65°
46°
24
64°
45°
25
66°
47°
26
63°
47°
27
64°
48°
28
63°
48°
29
66°
47°
30
61°
43°
31
62°
44°
1
69°
50°
2
71°
52°
3
72°
52°
4
70°
51°
5
68°
48°
6
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Marcel-Stillwater
Lake Marcel-Stillwater's May 2026 forecast shows daily high temperatures ranging from 52° to 72°, with overnight lows between 42° and 52°. The average high for May is 65° 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 Lake Marcel-Stillwater. See also: June | July | August.