S
M
T
W
T
F
S
30
77°
34°
31
86°
33°
1
79°
46°
2
62°
42°
3
62°
40°
4
62°
36°
5
68°
37°
6
60°
46°
7
69°
38°
8
78°
35°
9
88°
36°
10
86°
42°
11
76°
42°
12
67°
34°
13
63°
38°
14
70°
34°
15
70°
34°
16
69°
48°
17
62°
43°
18
76°
43°
19
81°
39°
20
86°
37°
21
85°
40°
22
76°
40°
23
73°
33°
24
79°
49°
25
56°
31°
26
63°
37°
27
65°
34°
28
66°
33°
29
71°
33°
30
71°
37°
1
66°
33°
2
67°
36°
3
69°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grandview
Grandview's September 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 31° and 49°. The average high for September is 67° with an average low of 36°. 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 Grandview. See also: October | November | December.
