S
M
T
W
T
F
S
26
30°
18°
27
28°
18°
28
21°
16°
29
25°
16°
30
19°
14°
1
21°
12°
2
34°
18°
3
34°
27°
4
32°
23°
5
28°
16°
6
16°
7°
7
30°
14°
8
36°
25°
9
37°
23°
10
41°
21°
11
46°
30°
12
50°
37°
13
54°
37°
14
46°
34°
15
48°
32°
16
43°
30°
17
37°
23°
18
25°
19°
19
24°
23°
20
32°
24°
21
33°
23°
22
32°
28°
23
45°
32°
24
49°
33°
25
51°
35°
26
50°
34°
27
46°
32°
28
52°
32°
29
50°
35°
30
49°
36°
31
50°
26°
1
45°
29°
2
46°
27°
3
44°
21°
4
48°
27°
5
50°
28°
6
52°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Mary's
St. Mary's's May 2026 forecast shows daily high temperatures ranging from 24° to 52°, with overnight lows between 19° and 36°. The average high for May is 44° 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 St. Mary's. See also: June | July | August.
