S
M
T
W
T
F
S
26
79°
63°
27
70°
64°
28
79°
66°
29
84°
66°
30
90°
70°
1
84°
68°
2
68°
61°
3
72°
57°
4
77°
62°
5
78°
64°
6
83°
67°
7
88°
69°
8
77°
67°
9
80°
65°
10
81°
69°
11
82°
68°
12
83°
66°
13
81°
65°
14
83°
67°
15
84°
66°
16
82°
68°
17
81°
78°
18
81°
71°
19
83°
71°
20
86°
72°
21
83°
72°
22
82°
67°
23
81°
66°
24
81°
67°
25
82°
72°
26
82°
72°
27
83°
69°
28
82°
71°
29
83°
72°
30
84°
72°
31
83°
73°
1
83°
73°
2
84°
74°
3
84°
74°
4
85°
73°
5
85°
74°
6
84°
74°
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 77° to 88°, with overnight lows between 62° and 78°. The average high for May is 82° with an average low of 70°. 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.
