S
M
T
W
T
F
S
30
68°
54°
31
67°
52°
1
67°
51°
2
66°
50°
3
66°
51°
4
67°
54°
5
67°
56°
6
68°
52°
7
67°
51°
8
65°
52°
9
65°
50°
10
66°
54°
11
67°
53°
12
66°
51°
13
66°
50°
14
67°
48°
15
64°
47°
16
64°
48°
17
65°
47°
18
65°
53°
19
68°
54°
20
67°
53°
21
69°
53°
22
69°
52°
23
65°
50°
24
67°
49°
25
61°
46°
26
62°
47°
27
64°
46°
28
65°
45°
29
59°
45°
30
65°
49°
1
65°
47°
2
Hist. Avg.
60°
45°
3
Hist. Avg.
60°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Echo
Lake Echo's September 2026 forecast shows daily high temperatures ranging from 59° to 69°, with overnight lows between 45° and 56°. The average high for September is 66° with an average low of 50°. 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 Lake Echo. See also: October | November | December.