S
M
T
W
T
F
S
26
61°
45°
27
73°
45°
28
63°
50°
29
59°
45°
30
55°
43°
1
50°
37°
2
46°
32°
3
61°
34°
4
73°
46°
5
64°
43°
6
54°
41°
7
57°
36°
8
64°
45°
9
72°
52°
10
63°
50°
11
68°
39°
12
72°
37°
13
59°
45°
14
63°
43°
15
64°
39°
16
77°
57°
17
82°
61°
18
86°
64°
19
88°
58°
20
65°
45°
21
68°
49°
22
66°
60°
23
74°
61°
24
74°
60°
25
77°
61°
26
78°
60°
27
79°
59°
28
79°
57°
29
78°
59°
30
79°
61°
31
80°
59°
1
77°
56°
2
79°
60°
3
76°
58°
4
72°
58°
5
73°
56°
6
75°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Marys Township
St. Marys Township's May 2026 forecast shows daily high temperatures ranging from 65° to 88°, with overnight lows between 45° and 62°. The average high for May is 76° with an average low of 58°. 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 Township. See also: June | July | August.