S
M
T
W
T
F
S
30
65°
49°
31
71°
46°
1
78°
47°
2
76°
52°
3
66°
53°
4
63°
47°
5
55°
49°
6
61°
52°
7
64°
46°
8
71°
46°
9
75°
44°
10
63°
46°
11
54°
38°
12
55°
34°
13
64°
41°
14
54°
37°
15
61°
40°
16
68°
44°
17
73°
42°
18
71°
45°
19
72°
45°
20
62°
38°
21
64°
40°
22
66°
43°
23
72°
48°
24
65°
44°
25
54°
42°
26
55°
41°
27
63°
38°
28
53°
40°
29
57°
37°
30
52°
37°
1
54°
38°
2
51°
30°
3
48°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Nisku
Nisku's September 2026 forecast shows daily high temperatures ranging from 48° to 73°, with overnight lows between 27° and 48°. The average high for September is 60° with an average low of 40°. 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 Nisku. See also: October | November | December.