S
M
T
W
T
F
S
26
57°
38°
27
69°
30°
28
51°
47°
29
52°
41°
30
43°
34°
1
41°
28°
2
41°
29°
3
53°
25°
4
69°
41°
5
68°
50°
6
54°
39°
7
53°
28°
8
57°
28°
9
60°
45°
10
58°
32°
11
56°
28°
12
63°
25°
13
63°
40°
14
42°
39°
15
63°
38°
16
72°
37°
17
78°
60°
18
86°
61°
19
81°
61°
20
65°
47°
21
60°
42°
22
57°
37°
23
53°
43°
24
56°
45°
25
72°
48°
26
79°
41°
27
81°
48°
28
65°
42°
29
73°
43°
30
68°
40°
31
71°
46°
1
68°
40°
2
70°
43°
3
71°
48°
4
75°
52°
5
74°
54°
6
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Marys
St. Marys's May 2026 forecast shows daily high temperatures ranging from 65° to 81°, with overnight lows between 40° and 54°. The average high for May is 72° with an average low of 46°. 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. Marys. See also: June | July | August.
