S
M
T
W
T
F
S
29
90°
45°
30
87°
41°
31
62°
43°
1
54°
33°
2
70°
37°
3
65°
37°
4
63°
28°
5
70°
25°
6
60°
36°
7
67°
32°
8
67°
47°
9
78°
38°
10
54°
33°
11
86°
45°
12
86°
47°
13
85°
48°
14
79°
52°
15
76°
48°
16
87°
42°
17
50°
23°
18
63°
28°
19
81°
32°
20
86°
44°
21
91°
51°
22
91°
52°
23
82°
45°
24
62°
38°
25
60°
34°
26
63°
36°
27
66°
39°
28
70°
44°
29
68°
46°
30
69°
40°
1
64°
44°
2
67°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Herndon
Herndon's April 2026 forecast shows daily high temperatures ranging from 50° to 91°, with overnight lows between 23° and 52°. The average high for April is 71° with an average low of 40°. 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 Herndon. See also: May | June | July.
