S
M
T
W
T
F
S
30
95°
65°
31
96°
71°
1
97°
73°
2
96°
73°
3
99°
75°
4
98°
76°
5
101°
76°
6
102°
75°
7
101°
74°
8
98°
75°
9
95°
74°
10
99°
72°
11
98°
74°
12
97°
74°
13
93°
69°
14
91°
71°
15
89°
68°
16
86°
62°
17
87°
66°
18
85°
66°
19
87°
66°
20
88°
65°
21
88°
67°
22
87°
66°
23
88°
65°
24
87°
66°
25
86°
65°
26
82°
63°
27
77°
57°
28
76°
54°
29
75°
53°
30
76°
54°
1
80°
56°
2
82°
57°
3
74°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Swan Lake
Swan Lake's September 2026 forecast shows daily high temperatures ranging from 74° to 102°, with overnight lows between 53° and 76°. The average high for September is 89° with an average low of 66°. 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 Lake. See also: October | November | December.
