S
M
T
W
T
F
S
29
82°
46°
30
78°
51°
31
65°
55°
1
63°
50°
2
64°
39°
3
79°
47°
4
82°
39°
5
82°
45°
6
84°
48°
7
73°
49°
8
77°
51°
9
71°
51°
10
67°
47°
11
54°
39°
12
58°
43°
13
63°
45°
14
69°
46°
15
66°
45°
16
65°
46°
17
60°
47°
18
64°
45°
19
63°
45°
20
70°
44°
21
65°
41°
22
68°
46°
23
64°
45°
24
64°
48°
25
65°
43°
26
69°
45°
27
74°
48°
28
75°
51°
29
75°
49°
30
76°
51°
1
77°
50°
2
71°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in O'Brien
O'Brien's April 2026 forecast shows daily high temperatures ranging from 54° to 77°, with overnight lows between 39° and 51°. The average high for April is 68° with an average low of 47°. 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 O'Brien. See also: May | June | July.