S
M
T
W
T
F
S
29
84°
50°
30
79°
52°
31
67°
56°
1
62°
54°
2
62°
45°
3
73°
43°
4
77°
44°
5
80°
48°
6
73°
44°
7
70°
49°
8
75°
49°
9
76°
52°
10
69°
55°
11
62°
50°
12
59°
48°
13
64°
46°
14
63°
48°
15
63°
44°
16
70°
47°
17
72°
43°
18
75°
41°
19
75°
45°
20
69°
54°
21
60°
51°
22
61°
48°
23
70°
46°
24
70°
48°
25
59°
50°
26
64°
48°
27
66°
46°
28
72°
47°
29
73°
47°
30
71°
50°
1
71°
50°
2
68°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Fairfax
Fairfax's April 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 46° and 51°. The average high for April is 68° with an average low of 49°. 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 Fairfax. See also: May | June | July.