S
M
T
W
T
F
S
29
67°
26°
30
73°
58°
31
82°
65°
1
80°
53°
2
85°
51°
3
78°
64°
4
85°
61°
5
65°
40°
6
61°
33°
7
50°
34°
8
67°
28°
9
76°
48°
10
81°
47°
11
67°
42°
12
86°
63°
13
75°
61°
14
85°
62°
15
86°
61°
16
82°
57°
17
80°
46°
18
68°
45°
19
68°
50°
20
67°
49°
21
75°
55°
22
79°
58°
23
77°
42°
24
74°
51°
25
71°
48°
26
70°
44°
27
63°
41°
28
63°
43°
29
69°
48°
30
71°
51°
1
69°
52°
2
73°
52°
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 63° to 86°, with overnight lows between 41° and 63°. The average high for April is 74° with an average low of 51°. 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.