S
M
T
W
T
F
S
30
59°
49°
31
58°
52°
1
58°
49°
2
57°
50°
3
59°
43°
4
54°
39°
5
51°
41°
6
51°
37°
7
48°
34°
8
48°
36°
9
47°
33°
10
46°
35°
11
47°
43°
12
48°
46°
13
56°
44°
14
56°
46°
15
54°
44°
16
56°
35°
17
50°
32°
18
43°
37°
19
43°
42°
20
51°
39°
21
52°
38°
22
52°
36°
23
48°
39°
24
49°
39°
25
47°
37°
26
47°
31°
27
41°
38°
28
44°
39°
29
43°
28°
30
42°
29°
1
36°
35°
2
45°
34°
3
45°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yellowknife
Yellowknife's September 2026 forecast shows daily high temperatures ranging from 36° to 59°, with overnight lows between 28° and 52°. The average high for September is 49° with an average low of 39°. 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 Yellowknife. See also: October | November | December.
