S
M
T
W
T
F
S
30
57°
49°
31
59°
48°
1
59°
47°
2
56°
48°
3
56°
48°
4
57°
46°
5
56°
46°
6
55°
45°
7
54°
44°
8
55°
45°
9
53°
45°
10
54°
44°
11
55°
46°
12
55°
46°
13
56°
45°
14
55°
45°
15
54°
44°
16
54°
41°
17
55°
46°
18
55°
45°
19
54°
45°
20
55°
44°
21
55°
45°
22
54°
44°
23
54°
44°
24
53°
43°
25
53°
42°
26
52°
41°
27
52°
40°
28
51°
41°
29
51°
43°
30
52°
42°
1
Hist. Avg.
49°
39°
2
Hist. Avg.
49°
39°
3
Hist. Avg.
48°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Nelson Lagoon
Nelson Lagoon's September 2026 forecast shows daily high temperatures ranging from 51° to 59°, with overnight lows between 40° and 49°. The average high for September is 55° with an average low of 45°. 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 Nelson Lagoon. See also: October | November | December.