S
M
T
W
T
F
S
27
67°
60°
28
71°
61°
29
75°
56°
30
82°
61°
1
88°
58°
2
89°
63°
3
71°
59°
4
67°
58°
5
68°
48°
6
69°
49°
7
71°
47°
8
70°
48°
9
70°
50°
10
69°
45°
11
69°
48°
12
72°
46°
13
73°
44°
14
62°
41°
15
61°
41°
16
63°
44°
17
67°
48°
18
68°
50°
19
71°
50°
20
69°
49°
21
71°
46°
22
62°
40°
23
58°
38°
24
58°
42°
25
68°
47°
26
70°
43°
27
61°
37°
28
56°
38°
29
60°
46°
30
68°
47°
31
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Chantilly
Chantilly's October 2026 forecast shows daily high temperatures ranging from 56° to 89°, with overnight lows between 37° and 63°. The average high for October is 69° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Chantilly. See also: November | December | January.
