S
M
T
W
T
F
S
30
78°
63°
31
79°
65°
1
81°
64°
2
79°
64°
3
80°
62°
4
78°
54°
5
77°
56°
6
77°
56°
7
79°
57°
8
83°
59°
9
83°
61°
10
82°
55°
11
75°
53°
12
75°
57°
13
77°
53°
14
76°
53°
15
73°
54°
16
72°
53°
17
73°
52°
18
74°
54°
19
77°
51°
20
73°
56°
21
78°
54°
22
76°
58°
23
79°
57°
24
79°
57°
25
78°
56°
26
77°
57°
27
76°
56°
28
79°
57°
29
79°
54°
30
75°
54°
1
76°
56°
2
77°
52°
3
77°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alexandria
Alexandria's September 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 45° and 65°. The average high for September is 77° with an average low of 56°. 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 Alexandria. See also: October | November | December.