S
M
T
W
T
F
S
30
80°
55°
31
67°
52°
1
69°
55°
2
74°
54°
3
75°
53°
4
80°
53°
5
87°
57°
6
70°
58°
7
60°
57°
8
62°
48°
9
72°
53°
10
75°
50°
11
63°
46°
12
58°
41°
13
61°
41°
14
62°
43°
15
63°
44°
16
60°
41°
17
60°
39°
18
58°
40°
19
59°
39°
20
64°
45°
21
65°
44°
22
61°
43°
23
56°
42°
24
58°
42°
25
66°
43°
26
66°
43°
27
65°
42°
28
64°
41°
29
59°
39°
30
55°
36°
1
54°
36°
2
50°
33°
3
50°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Swan River
Swan River's September 2026 forecast shows daily high temperatures ranging from 50° to 75°, with overnight lows between 33° and 57°. The average high for September is 61° with an average low of 43°. 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 Swan River. See also: October | November | December.
