S
M
T
W
T
F
S
29
66°
34°
30
73°
52°
31
77°
57°
1
86°
60°
2
83°
63°
3
82°
60°
4
82°
64°
5
71°
48°
6
68°
47°
7
67°
41°
8
61°
42°
9
69°
49°
10
77°
53°
11
77°
55°
12
78°
57°
13
82°
61°
14
85°
60°
15
84°
59°
16
80°
60°
17
78°
49°
18
76°
56°
19
77°
55°
20
77°
56°
21
79°
56°
22
79°
57°
23
78°
57°
24
79°
56°
25
79°
55°
26
78°
57°
27
79°
57°
28
77°
55°
29
78°
53°
30
72°
52°
1
71°
57°
2
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Chantilly
Chantilly's April 2026 forecast shows daily high temperatures ranging from 61° to 85°, with overnight lows between 41° and 64°. The average high for April is 76° with an average low of 54°. 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 Chantilly. See also: May | June | July.