S
M
T
W
T
F
S
30
80°
61°
31
83°
65°
1
86°
61°
2
85°
60°
3
79°
59°
4
80°
60°
5
81°
66°
6
85°
66°
7
86°
65°
8
80°
65°
9
79°
66°
10
84°
64°
11
84°
62°
12
83°
65°
13
81°
60°
14
80°
57°
15
76°
58°
16
75°
57°
17
75°
56°
18
76°
57°
19
79°
61°
20
80°
62°
21
81°
59°
22
76°
54°
23
74°
59°
24
75°
61°
25
79°
53°
26
74°
58°
27
71°
54°
28
Hist. Avg.
76°
60°
29
Hist. Avg.
76°
59°
30
Hist. Avg.
75°
59°
1
Hist. Avg.
75°
58°
2
Hist. Avg.
75°
58°
3
Hist. Avg.
74°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Chevy Chase
Chevy Chase's September 2026 forecast shows daily high temperatures ranging from 71° to 86°, with overnight lows between 53° and 66°. The average high for September is 80° with an average low of 60°. 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.
