S
M
T
W
T
F
S
30
89°
72°
31
87°
73°
1
98°
77°
2
87°
73°
3
96°
72°
4
92°
68°
5
82°
63°
6
81°
62°
7
83°
61°
8
82°
62°
9
86°
65°
10
92°
64°
11
85°
63°
12
82°
66°
13
82°
64°
14
84°
61°
15
80°
60°
16
75°
64°
17
75°
59°
18
74°
56°
19
77°
57°
20
81°
61°
21
78°
62°
22
79°
62°
23
77°
61°
24
77°
59°
25
76°
61°
26
79°
61°
27
79°
60°
28
76°
55°
29
70°
52°
30
72°
56°
1
71°
57°
2
71°
55°
3
68°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chevy Chase
Chevy Chase's September 2026 forecast shows daily high temperatures ranging from 68° to 96°, with overnight lows between 52° and 73°. The average high for September is 80° with an average low of 61°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Chevy Chase. See also: October | November | December.
