S
M
T
W
T
F
S
26
58°
44°
27
70°
37°
28
63°
49°
29
60°
54°
30
69°
41°
1
68°
47°
2
59°
40°
3
63°
42°
4
72°
52°
5
83°
61°
6
76°
57°
7
66°
41°
8
62°
40°
9
63°
43°
10
70°
53°
11
69°
54°
12
69°
55°
13
73°
54°
14
72°
52°
15
69°
54°
16
69°
52°
17
68°
56°
18
70°
58°
19
78°
58°
20
77°
57°
21
76°
59°
22
78°
59°
23
79°
60°
24
79°
59°
25
75°
56°
26
72°
59°
27
72°
60°
28
80°
61°
29
78°
61°
30
79°
60°
31
77°
61°
1
76°
55°
2
72°
55°
3
72°
54°
4
73°
54°
5
73°
55°
6
74°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Chantilly
Chantilly's May 2026 forecast shows daily high temperatures ranging from 59° to 83°, with overnight lows between 40° and 61°. The average high for May is 72° 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 May weather will actually feel in Chantilly. See also: June | July | August.
