S
M
T
W
T
F
S
30
67°
48°
31
74°
47°
1
68°
46°
2
75°
48°
3
74°
48°
4
75°
47°
5
76°
46°
6
76°
36°
7
70°
36°
8
60°
38°
9
62°
40°
10
61°
42°
11
62°
45°
12
68°
44°
13
71°
42°
14
70°
38°
15
61°
33°
16
59°
31°
17
Hist. Avg.
66°
40°
18
Hist. Avg.
65°
40°
19
Hist. Avg.
65°
40°
20
Hist. Avg.
65°
39°
21
Hist. Avg.
64°
39°
22
Hist. Avg.
64°
39°
23
Hist. Avg.
63°
38°
24
Hist. Avg.
63°
38°
25
Hist. Avg.
62°
38°
26
Hist. Avg.
62°
38°
27
Hist. Avg.
61°
37°
28
Hist. Avg.
61°
37°
29
Hist. Avg.
60°
37°
30
Hist. Avg.
60°
36°
1
Hist. Avg.
59°
36°
2
Hist. Avg.
59°
36°
3
Hist. Avg.
58°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Swan River
Swan River's September 2026 forecast shows daily high temperatures ranging from 59° to 76°, with overnight lows between 31° and 48°. The average high for September is 68° with an average low of 42°. 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.
