S
M
T
W
T
F
S
29
77°
41°
30
83°
60°
31
83°
62°
1
82°
62°
2
81°
67°
3
82°
67°
4
N/A
5
66°
37°
6
72°
44°
7
67°
44°
8
77°
52°
9
75°
55°
10
80°
57°
11
80°
59°
12
76°
62°
13
77°
57°
14
77°
52°
15
75°
52°
16
74°
53°
17
71°
44°
18
75°
51°
19
74°
50°
20
76°
52°
21
76°
53°
22
75°
51°
23
68°
50°
24
76°
51°
25
75°
52°
26
75°
54°
27
77°
52°
28
74°
52°
29
73°
51°
30
67°
52°
1
71°
53°
2
70°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Big Flat
Big Flat's April 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 37° and 62°. The average high for April is 74° with an average low of 52°. 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 Big Flat. See also: May | June | July.