S
M
T
W
T
F
S
26
42°
28°
27
35°
27°
28
36°
27°
29
36°
28°
30
37°
27°
1
37°
29°
2
39°
31°
3
38°
29°
4
38°
28°
5
39°
31°
6
40°
34°
7
40°
33°
8
41°
33°
9
41°
32°
10
42°
33°
11
42°
35°
12
43°
33°
13
43°
33°
14
46°
34°
15
46°
34°
16
49°
37°
17
47°
39°
18
45°
36°
19
45°
35°
20
46°
35°
21
46°
38°
22
48°
41°
23
47°
44°
24
47°
43°
25
48°
43°
26
53°
44°
27
54°
45°
28
54°
44°
29
53°
42°
30
50°
39°
31
54°
46°
1
56°
45°
2
55°
39°
3
49°
40°
4
55°
40°
5
52°
38°
6
50°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Moritz
St. Moritz's May 2026 forecast shows daily high temperatures ranging from 35° to 56°, with overnight lows between 27° and 46°. The average high for May is 45° with an average low of 36°. 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 St. Moritz. See also: June | July | August.
