S
M
T
W
T
F
S
29
72°
61°
30
75°
59°
31
75°
59°
1
77°
59°
2
79°
61°
3
79°
66°
4
79°
64°
5
81°
64°
6
70°
59°
7
64°
61°
8
68°
61°
9
68°
63°
10
72°
61°
11
77°
55°
12
77°
55°
13
77°
59°
14
77°
59°
15
79°
60°
16
80°
62°
17
84°
63°
18
84°
64°
19
88°
59°
20
72°
60°
21
73°
61°
22
78°
62°
23
79°
61°
24
81°
64°
25
83°
65°
26
81°
65°
27
79°
61°
28
78°
65°
29
81°
67°
30
82°
66°
1
81°
64°
2
82°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in St. Marys
St. Marys's April 2026 forecast shows daily high temperatures ranging from 72° to 88°, with overnight lows between 59° and 67°. The average high for April is 80° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in St. Marys. See also: May | June | July.