S
M
T
W
T
F
S
30
77°
64°
31
78°
63°
1
74°
57°
2
70°
56°
3
69°
56°
4
73°
54°
5
72°
55°
6
69°
52°
7
77°
57°
8
77°
58°
9
75°
57°
10
71°
56°
11
70°
55°
12
75°
56°
13
71°
52°
14
69°
52°
15
71°
54°
16
74°
54°
17
74°
53°
18
72°
50°
19
64°
49°
20
63°
48°
21
68°
53°
22
67°
52°
23
71°
49°
24
62°
47°
25
61°
44°
26
61°
43°
27
60°
44°
28
60°
42°
29
63°
43°
30
65°
46°
1
66°
45°
2
59°
43°
3
57°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alexandria Bay
Alexandria Bay's September 2026 forecast shows daily high temperatures ranging from 57° to 78°, with overnight lows between 42° and 64°. The average high for September is 69° with an average low of 52°. 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 Bay. See also: October | November | December.
