S
M
T
W
T
F
S
30
89°
70°
31
89°
70°
1
90°
69°
2
88°
69°
3
85°
68°
4
85°
63°
5
83°
63°
6
85°
66°
7
86°
66°
8
87°
67°
9
86°
67°
10
84°
65°
11
83°
60°
12
86°
64°
13
88°
61°
14
83°
58°
15
81°
58°
16
80°
57°
17
81°
58°
18
82°
59°
19
87°
59°
20
87°
63°
21
86°
63°
22
86°
62°
23
85°
63°
24
83°
60°
25
85°
60°
26
85°
61°
27
84°
58°
28
85°
60°
29
85°
61°
30
84°
60°
1
85°
59°
2
85°
59°
3
84°
52°
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 80° to 90°, with overnight lows between 52° and 70°. The average high for September is 85° with an average low of 62°. 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.
