S
M
T
W
T
F
S
30
58°
49°
31
62°
42°
1
69°
51°
2
74°
57°
3
64°
45°
4
56°
42°
5
51°
44°
6
57°
47°
7
60°
45°
8
61°
47°
9
61°
48°
10
60°
45°
11
56°
44°
12
58°
45°
13
59°
44°
14
60°
45°
15
48°
38°
16
58°
47°
17
57°
47°
18
52°
44°
19
54°
45°
20
55°
41°
21
47°
40°
22
42°
39°
23
45°
36°
24
41°
35°
25
41°
34°
26
40°
34°
27
43°
37°
28
40°
34°
29
40°
38°
30
41°
38°
1
47°
40°
2
50°
38°
3
49°
38°
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 40° to 74°, with overnight lows between 34° and 57°. The average high for September is 52° with an average low of 42°. 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.
