S
M
T
W
T
F
S
30
72°
65°
31
74°
60°
1
78°
64°
2
79°
66°
3
80°
60°
4
77°
55°
5
72°
54°
6
74°
56°
7
74°
54°
8
70°
55°
9
74°
60°
10
71°
55°
11
67°
53°
12
69°
55°
13
66°
54°
14
68°
53°
15
71°
50°
16
72°
54°
17
70°
50°
18
66°
48°
19
71°
51°
20
74°
54°
21
74°
54°
22
73°
53°
23
72°
51°
24
66°
48°
25
71°
52°
26
71°
52°
27
70°
51°
28
61°
48°
29
60°
48°
30
62°
46°
1
59°
42°
2
59°
46°
3
63°
44°
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 59° to 80°, with overnight lows between 42° and 66°. The average high for September is 70° 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.
