S
M
T
W
T
F
S
26
23°
17°
27
40°
17°
28
44°
28°
29
47°
28°
30
59°
32°
1
66°
39°
2
64°
42°
3
70°
38°
4
50°
35°
5
43°
27°
6
68°
25°
7
63°
44°
8
67°
41°
9
64°
44°
10
71°
43°
11
65°
39°
12
73°
33°
13
72°
40°
14
54°
43°
15
52°
37°
16
50°
34°
17
38°
27°
18
52°
24°
19
57°
38°
20
47°
32°
21
56°
32°
22
60°
38°
23
66°
48°
24
68°
47°
25
76°
46°
26
64°
42°
27
62°
45°
28
67°
46°
29
68°
50°
30
64°
44°
31
70°
43°
1
68°
43°
2
68°
42°
3
66°
44°
4
55°
33°
5
56°
41°
6
57°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Saint Mary
Saint Mary's May 2026 forecast shows daily high temperatures ranging from 55° to 76°, with overnight lows between 33° and 50°. The average high for May is 65° with an average low of 43°. 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 Saint Mary. See also: June | July | August.
