S
M
T
W
T
F
S
30
54°
36°
31
55°
38°
1
57°
36°
2
53°
35°
3
54°
37°
4
55°
34°
5
55°
36°
6
58°
39°
7
57°
40°
8
53°
38°
9
57°
39°
10
59°
36°
11
57°
32°
12
55°
27°
13
55°
30°
14
54°
30°
15
54°
28°
16
47°
28°
17
47°
29°
18
49°
27°
19
45°
27°
20
46°
30°
21
45°
33°
22
46°
28°
23
47°
32°
24
45°
33°
25
46°
32°
26
42°
29°
27
40°
24°
28
40°
24°
29
Hist. Avg.
44°
29°
30
Hist. Avg.
43°
28°
1
Hist. Avg.
43°
28°
2
Hist. Avg.
42°
27°
3
Hist. Avg.
42°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lagoon
Lagoon's September 2026 forecast shows daily high temperatures ranging from 40° to 59°, with overnight lows between 24° and 40°. The average high for September is 51° with an average low of 32°. 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 Lagoon. See also: October | November | December.
