S
M
T
W
T
F
S
26
73°
53°
27
73°
49°
28
61°
45°
29
60°
41°
30
68°
39°
1
67°
36°
2
66°
34°
3
81°
50°
4
84°
51°
5
62°
46°
6
61°
42°
7
73°
43°
8
67°
48°
9
85°
42°
10
71°
52°
11
81°
43°
12
84°
58°
13
80°
47°
14
81°
53°
15
90°
62°
16
91°
63°
17
85°
63°
18
87°
61°
19
62°
51°
20
67°
46°
21
66°
56°
22
75°
55°
23
75°
54°
24
82°
48°
25
85°
54°
26
84°
61°
27
85°
64°
28
75°
66°
29
75°
66°
30
77°
66°
31
80°
66°
1
82°
60°
2
81°
58°
3
80°
56°
4
81°
57°
5
81°
61°
6
87°
63°
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 75° to 87°, with overnight lows between 56° and 66°. The average high for May is 80° with an average low of 62°. 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.
