S
M
T
W
T
F
S
30
80°
54°
31
81°
53°
1
77°
47°
2
77°
54°
3
84°
50°
4
77°
46°
5
76°
47°
6
76°
50°
7
78°
41°
8
72°
40°
9
66°
39°
10
67°
38°
11
67°
41°
12
68°
39°
13
67°
36°
14
63°
34°
15
62°
35°
16
63°
35°
17
65°
34°
18
63°
37°
19
64°
40°
20
67°
37°
21
72°
43°
22
71°
45°
23
75°
35°
24
65°
43°
25
62°
35°
26
61°
34°
27
59°
42°
28
60°
40°
29
59°
39°
30
62°
38°
1
61°
33°
2
59°
37°
3
57°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Crystal City
Crystal City's September 2026 forecast shows daily high temperatures ranging from 57° to 84°, with overnight lows between 33° and 54°. The average high for September is 68° with an average low of 41°. 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 Crystal City. See also: October | November | December.
