S
M
T
W
T
F
S
30
58°
49°
31
62°
42°
1
69°
51°
2
72°
53°
3
68°
53°
4
57°
42°
5
57°
39°
6
59°
45°
7
61°
45°
8
62°
38°
9
64°
51°
10
60°
49°
11
53°
38°
12
58°
41°
13
55°
42°
14
53°
37°
15
47°
33°
16
50°
43°
17
52°
40°
18
52°
46°
19
54°
44°
20
51°
44°
21
55°
40°
22
52°
38°
23
53°
40°
24
48°
37°
25
49°
39°
26
46°
35°
27
45°
38°
28
52°
41°
29
50°
40°
30
48°
40°
1
41°
37°
2
38°
36°
3
37°
34°
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 37° to 55°, with overnight lows between 33° and 46°. 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.
