S
M
T
W
T
F
S
30
67°
44°
31
71°
42°
1
76°
44°
2
78°
51°
3
63°
52°
4
60°
40°
5
61°
35°
6
69°
37°
7
74°
38°
8
77°
46°
9
72°
48°
10
57°
47°
11
53°
43°
12
62°
31°
13
70°
32°
14
60°
40°
15
62°
28°
16
71°
34°
17
71°
38°
18
70°
39°
19
71°
35°
20
71°
37°
21
74°
40°
22
64°
40°
23
63°
34°
24
61°
28°
25
51°
40°
26
52°
38°
27
59°
31°
28
64°
38°
29
57°
40°
30
58°
36°
1
59°
32°
2
59°
26°
3
56°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grande Prairie
Grande Prairie's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Grande Prairie. See also: October | November | December.
