S
M
T
W
T
F
S
30
75°
60°
31
76°
55°
1
77°
54°
2
74°
53°
3
73°
56°
4
75°
62°
5
80°
58°
6
79°
52°
7
75°
53°
8
72°
53°
9
75°
59°
10
77°
56°
11
74°
58°
12
71°
58°
13
71°
52°
14
70°
50°
15
68°
49°
16
69°
50°
17
69°
56°
18
73°
57°
19
76°
58°
20
77°
56°
21
74°
48°
22
72°
53°
23
67°
47°
24
71°
46°
25
65°
45°
26
65°
46°
27
Hist. Avg.
69°
49°
28
Hist. Avg.
69°
49°
29
Hist. Avg.
68°
49°
30
Hist. Avg.
68°
48°
1
Hist. Avg.
68°
48°
2
Hist. Avg.
67°
47°
3
Hist. Avg.
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Sylvan Lake
Sylvan Lake's September 2026 forecast shows daily high temperatures ranging from 65° to 80°, with overnight lows between 45° and 62°. The average high for September is 73° with an average low of 54°. 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 Sylvan Lake. See also: October | November | December.
